1. What time do you think……go home? (we should, should we, we ought, ought we)
2. There was no bus, so we ……to walk home. (have, had, must, should)
3. In this office you ……………. wear a tie, it’s not necessary. (can’t, don’t have to, mustn’t)
4. How much money….…. bring? (I need, do I need, shall I, I must)
5. Kate likes to relax in the evenings, but sometimes she has a meeting she…………. to go to. (should, must, has, need)
6. I……………go to London tomorrow, but I’m not sure. (can, may, will, would)
7. You ………. take an umbrella today. The sun is shining. (needn’t, mustn’t, can’t)
8. Where are my gloves? – I … put them on because it’s cold today. (can, must, have to)

1. What time do you think we should go home?
- In this sentence, the correct answer is "we should". This is because the question is asking for an opinion or suggestion, which is expressed using "should" in English. The word order in the question is inverted, so the verb "should" comes before the subject "we".

2. There was no bus, so we had to walk home.
- In this sentence, the correct answer is "had". This is because the situation in the sentence refers to a past event. "Had" is the past tense of the verb "have" and it is used to indicate necessity or obligation in the past.

3. In this office you don't have to wear a tie, it's not necessary.
- In this sentence, the correct answer is "don't have to". This is because the phrase "don't have to" is used to express lack of obligation or necessity. It means that wearing a tie is not a requirement in the office.

4. How much money do I need to bring?
- In this sentence, the correct answer is "do I need". This is because the question is asking about a personal requirement. The phrase "do I need" is used to form a question about necessity or requirement.

5. Kate likes to relax in the evenings, but sometimes she has a meeting she has to go to.
- In this sentence, the correct answer is "has to". This is because Kate has an obligation or necessity to attend the meeting. The phrase "has to" is used to indicate a requirement or obligation.

6. I may go to London tomorrow, but I'm not sure.
- In this sentence, the correct answer is "may". This is because the speaker is expressing the possibility of going to London, but is uncertain. "May" is used to show permission or possibility.

7. You needn't take an umbrella today. The sun is shining.
- In this sentence, the correct answer is "needn't". This is because "needn't" is used to indicate absence of necessity or obligation. The speaker is saying that it is not necessary to take an umbrella because the sun is shining.

8. Where are my gloves? - I have to put them on because it's cold today.
- In this sentence, the correct answer is "have to". This is because the speaker is expressing a necessity or obligation to put on the gloves due to the cold weather. "Have to" is used to indicate requirement or obligation.