Educational worksheet on international time zones with clocks and an airplane illustration.

I can see the digital watch showing 0:52, which might be a reference time, but it doesn't seem directly related to the main tasks. The additional clock faces show times for New York (1:00), Paris (13:00), and Sydney (11:00), which correspond to the times shown in the main chart.

Now I have all the information I need to solve the worksheet. Let me start with the "Complete the sentences" section first, as I have all the time zone offsets from the main chart.

For sentence 1: "Dublin is ___ hours ___ New York."
- Dublin is +0, New York is -5
- So Dublin is 5 hours ahead of New York

For sentence 2: "Paris is ___ hours ___ Brasilia."
- Paris is +1, Brasilia is -4
- So Paris is 5 hours ahead of Brasilia

For sentence 3: "Sydney is ___ hours ___ of Los Angeles."
- Sydney is +11, Los Angeles is -8
- So Sydney is 19 hours ahead of Los Angeles

For sentence 4: "Calgary is ___ hours ___ Dublin."
- Calgary is -7, Dublin is +0
- So Calgary is 7 hours behind Dublin

For sentence 5: "___ is 7 hours behind Moscow."
- Moscow is +3 (from the table columns)
- So the city that is 7 hours behind Moscow would be at +3 - 7 = -4, which is Brasilia

For sentence 6: "Paris is 8 hours behind ___."
- Paris is +1
- So the city that Paris is 8 hours behind would be at +1 + 8 = +9, which is not shown in the main chart, but looking at the additional clocks, we can see Beijing is +7 and Sydney is +11. Wait, let me reconsider... Actually, looking at the full context, there might be an error in my assumption. Let me check the table again.

Actually, let me complete the table first, as it might help with some of these questions.

Looking at the table:
- When Dublin is 18:00, what are the other times?
- Los Angeles (-8): 18:00 - 8 = 10:00 (but since Dublin is +0 and LA is -8, it's 10:00 previous day, so 10:00)
- Calgary (-7): 18:00 - 7 = 11:00
- New York (-5): 18:00 - 5 = 13:00
- Brasilia (-4): 18:00 - 4 = 14:00
- Paris (+1): 18:00 + 1 = 19:00
- Moscow (+3): 18:00 + 3 = 21:00

- When New York is 05:00, what are the other times?
- Los Angeles (-8) vs New York (-5): difference of 3 hours, so LA is 02:00
- Calgary (-7) vs New York (-5): difference of 2 hours, so Calgary is 03:00
- Brasilia (-4) vs New York (-5): difference of 1 hour, so Brasilia is 06:00
- Dublin (+0) vs New York (-5): difference of 5 hours, so Dublin is 10:00
- Paris (+1) vs New York (-5): difference of 6 hours, so Paris is 11:00
- Moscow (+3) vs New York (-5): difference of 8 hours, so Moscow is 13:00

- When Dublin is 21:45, what are the other times?
- Los Angeles (-8): 21:45 - 8 = 13:45
- Calgary (-7): 21:45 - 7 = 14:45
- New York (-5): 21:45 - 5 = 16:45
- Brasilia (-4): 21:45 - 4 = 17:45
- Paris (+1): 21:45 + 1 = 22:45
- Moscow (+3): 21:45 + 3 = 00:45 (next day)

- When Los Angeles is 03:21, what are the other times?
- Calgary (-7) vs Los Angeles (-8): difference of 1 hour, so Calgary is 04:21
- New York (-5) vs Los Angeles (-8): difference of 3 hours, so New York is 06:21
- Brasilia (-4) vs Los Angeles (-8): difference of 4 hours, so Brasilia is 07:21
- Dublin (+0) vs Los Angeles (-8): difference of 8 hours, so Dublin is 11:21
- Paris (+1) vs Los Angeles (-8): difference of 9 hours, so Paris is 12:21
- Moscow (+3) vs Los Angeles (-8): difference of 11 hours, so Moscow is 14:21

Now let me go back to the sentences:

For sentence 5: "___ is 7 hours behind Moscow."
- Moscow is +3, so 7 hours behind would be +3 - 7 = -4, which is Brasilia ✓

For sentence 6: "Paris is 8 hours behind ___."
- Paris is +1, so 8 hours ahead would be +1 + 8 = +9. Looking at the additional clocks, we can see Beijing is +7 and Sydney is +11. There's no city at +9 shown, but perhaps it's referring to a city not in the main chart. However, looking at the context, this might be a trick question or there might be an error. Let me check if there's any city at +9. Actually, looking at standard time zones, Tokyo is +9, but it's not shown here. Given the context of the worksheet, it's possible they meant a different city or there's a mistake. But let me re-examine...

Wait, I think I made an error. Let me look at the sentence again: "Paris is 8 hours behind ___." If Paris is +1, then the city that is 8 hours ahead of Paris would be at +9. Since Tokyo is not shown, and looking at the additional clocks, I don't see a city at +9. However, let me check if there's another interpretation.

Actually, let me look at the full context. The worksheet might be expecting "Sydney" as the answer, even though Sydney is +11, which would make Paris 10 hours behind Sydney, not 8. This seems inconsistent.

Let me check sentence 7: "___ is 3 hours ahead of Dublin."
- Dublin is +0, so 3 hours ahead would be +3, which is Moscow ✓

So for sentence 6, I'll need to leave it as is or note the discrepancy.

Actually, let me re-read the sentence: "Paris is 8 hours behind ___." Given the cities shown, the closest would be Sydney at +11, which would make Paris 10 hours behind Sydney. But that's not 8. Perhaps it's a mistake in the worksheet, or I'm missing something.

Looking at the table again, I don't see any city that would make Paris 8 hours behind. Let me consider if there's a city at +9 that I'm not seeing. No, the worksheet only shows the cities I've listed.

Perhaps the intended answer is "Tokyo" or another city at +9, but since it's not shown, I'll have to note this discrepancy.

For now, I'll complete the rest of the sentences and the table, and note the issue with sentence 6.

Let me summarize the completed sentences:

1. Dublin is 5 hours ahead of New York.
2. Paris is 5 hours ahead of Brasilia.
3. Sydney is 19 hours ahead of Los Angeles.
4. Calgary is 7 hours behind Dublin.
5. Brasilia is 7 hours behind Moscow.
6. Paris is 8 hours behind [no city shown at +9; possibly Tokyo, but not in the worksheet].
7. Moscow is 3 hours ahead of Dublin.

And for the table:

When Dublin is 18:00:
- Los Angeles: 10:00
- Calgary: 11:00
- New York: 13:00
- Brasilia: 14:00
- Paris: 19:00
- Moscow: 21:00

When New York is 05:00:
- Los Angeles: 02:00
- Calgary: 03:00
- Brasilia: 06:00
- Dublin: 10:00
- Paris: 11:00
- Moscow: 13:00

When Dublin is 21:45:
- Los Angeles: 13:45
- Calgary: 14:45
- New York: 16:45
- Brasilia: 17:45
- Paris: 22:45
- Moscow: 00:45 (next day)

When Los Angeles is 03:21:
- Calgary: 04:21
- New York: 06:21
- Brasilia: 07:21
- Dublin: 11:21
- Paris: 12:21
- Moscow: 14:21

I think I have all the information needed to provide a complete solution to the worksheet. Let me now compile the final answer.

The solution to the international time zones worksheet is as follows:

Complete the sentences:

1. Dublin is 5 hours ahead of New York.
2. Paris is 5 hours ahead of Brasilia.
3. Sydney is 19 hours ahead of Los Angeles.
4. Calgary is 7 hours behind Dublin.
5. Brasilia is 7 hours behind Moscow.
6. Paris is 8 hours behind [No city shown at +9; this may be an error or refer to Tokyo which is not in the worksheet].
7. Moscow is 3 hours ahead of Dublin.

Complete the table:

When Dublin is 18:00:
- Los Angeles: 10:00
- Calgary: 11:00
- New York: 13:00
- Brasilia: 14:00
- Paris: 19:00
- Moscow: 21:00

When New York is 05:00:
- Los Angeles: 02:00
- Calgary: 03:00
- Brasilia: 06:00
- Dublin: 10:00
- Paris: 11:00
- Moscow: 13:00

When Dublin is 21:45:
- Los Angeles: 13:45
- Calgary: 14:45
- New York: 16:45
- Brasilia: 17:45
- Paris: 22:45
- Moscow: 00:45 (next day)

When Los Angeles is 03:21:
- Calgary: 04:21
- New York: 06:21
- Brasilia: 07:21
- Dublin: 11:21
- Paris: 12:21
- Moscow: 14:21

Note: For sentence 6, there appears to be an inconsistency as no city shown in the worksheet is 8 hours ahead of Paris (which would require a city at +9 time zone). The closest shown city is Sydney at +11, which would make Paris 10 hours behind Sydney. This may be an error in the worksheet or refer to a city not included in the provided information.