Demonstrative Adjectives worksheet for language learning, featuring a cartoon girl and cat.

To solve the problem, we need to choose the correct demonstrative adjective (this, that, these, those) for each sentence based on the context provided. Demonstrative adjectives are used to indicate which specific noun(s) we are referring to, and their choice depends on whether the noun is singular or plural and its proximity to the speaker.

Here is the step-by-step solution:

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Instructions Recap:

- Demonstrative Adjectives: this, that, these, those
- Purpose: To point out something near in distance or time (this, these) or far away in distance or time (that, those).

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Sentences and Solutions:

1. I hope ________ sick dog is going to recover soon.
- The dog is singular, so we use "this" or "that."
- Since the dog is likely nearby (implied by the context of hoping it recovers), we use this.
- Answer: this

2. Yes, I saw ________ old man walking down the street.
- The man is singular, so we use "this" or "that."
- Since the man is described as "walking down the street," he is likely farther away from the speaker, so we use that.
- Answer: that

3. I thought ________ files were important.
- The files are plural, so we use "these" or "those."
- Since the files are being discussed in a general sense without specifying their location, we can assume they are not immediately close, so we use those.
- Answer: those

4. ________ files are really high.
- The files are plural, so we use "these" or "those."
- Since the files are being directly referred to as "really high," they are likely close to the speaker, so we use these.
- Answer: These

5. I never cooked ________ cookies before.
- The cookies are plural, so we use "these" or "those."
- Since the cookies are being mentioned in the past ("never cooked"), they are likely not present now, so we use those.
- Answer: those

6. ________ cookies are terrible.
- The cookies are plural, so we use "these" or "those."
- Since the cookies are being directly criticized as "terrible," they are likely close to the speaker, so we use these.
- Answer: These

7. I called ________ help, but she refused.
- The help is singular, so we use "this" or "that."
- Since the help is being directly addressed, it is likely close to the speaker, so we use this.
- Answer: this

8. Where did ________ kids come from?
- The kids are plural, so we use "these" or "those."
- Since the kids' origin is being questioned, they are likely not close to the speaker, so we use those.
- Answer: those

9. I play ________ cards with my friends.
- The cards are plural, so we use "these" or "those."
- Since the cards are being played with friends, they are likely close to the speaker, so we use these.
- Answer: these

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Final Answers:

1. this
2. that
3. those
4. These
5. those
6. These
7. this
8. those
9. these

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Explanation:

- This/These: Used for things/places/people that are close to the speaker or the listener.
- That/Those: Used for things/places/people that are farther away from the speaker or the listener.

By considering the context of each sentence, we can determine the appropriate demonstrative adjective to use.

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Final Answer:
\boxed{this, that, those, These, those, These, this, those, these}