English grammar exercise focusing on using "Be," "Being," and "Been" correctly in sentences.

To solve this problem, we need to fill in the blanks with the correct form of the verb "be" (i.e., be, being, or been) based on the context of each sentence. Let's analyze each sentence step by step:

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1. No human ______ should be homeless.

- This sentence is a general statement about humans.
- The correct form here is be because it describes a state or condition.
- Answer: be

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2. We'll leave him in charge for the time ______.

- The phrase "for the time being" is a common idiom meaning "for now" or "until something changes."
- The correct form here is being.
- Answer: being

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3. I will always ______ there for you!

- This sentence expresses a promise or commitment.
- The correct form here is be because it describes a future action or state.
- Answer: be

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4. I am tired because I've ______ running.

- The sentence uses the present perfect tense ("I've"), which requires the past participle of the verb.
- The correct form here is been because it refers to an ongoing activity that has affected the present state (tiredness).
- Answer: been

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5. The criminal will ______ caught and executed.

- The sentence uses the future passive voice ("will be caught").
- The correct form here is be because it describes a future event that will happen to the criminal.
- Answer: be

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6. Do you like ______ so ignorant?

- This sentence uses the gerund form of the verb after "like."
- The correct form here is being because it describes the state of being ignorant.
- Answer: being

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7. Has this pasta ______ re-heated?

- The sentence uses the present perfect tense ("Has..."), which requires the past participle of the verb.
- The correct form here is been because it describes an action that has already occurred.
- Answer: been

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8. Your mom's paintings are ______ sold next week.

- The sentence uses the passive voice ("are...sold") and indicates a future action.
- The correct form here is being because it describes an action that is currently happening but will be completed in the future.
- Answer: being

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9. ______ friendly to everyone you meet!

- This sentence is an imperative command.
- The correct form here is Be because it instructs someone to act in a certain way.
- Answer: Be

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10. The Tiger has ______ hunting for two hours.

- The sentence uses the present perfect continuous tense ("has been..."), which requires the present participle of the verb.
- The correct form here is been because it describes an ongoing activity over a period of time.
- Answer: been

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11. He has ______ doing his homework since morning.

- The sentence uses the present perfect continuous tense ("has been..."), which requires the present participle of the verb.
- The correct form here is been because it describes an ongoing activity since a specific time.
- Answer: been

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12. It is ______ hard for me to stay here for long.

- This sentence describes a current state or condition.
- The correct form here is being because it emphasizes the ongoing nature of the difficulty.
- Answer: being

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Final Answer:

1. be
2. being
3. be
4. been
5. be
6. being
7. been
8. being
9. Be
10. been
11. been
12. being

Boxed Answer:
\[
\boxed{\text{be, being, be, been, be, being, been, being, Be, been, been, being}}
\]