1. Who after your garden lately? has looked has been looking looked
2. I was late. My friends for me.
were already waiting had already been waiting already waited
3. What to him in the last few days?
happened has happened is happening
4. What time your classes ?
are starting do start will start
5. He his grammar for two hours yesterday.
has been practising was practising practised
6. He his passport and couldn’t go away.
had lost has lost lost
7. He a word. The man a foreign language.
didn’t understand; didn’t understand; wasn’t understanding;
was speaking spoke was speaking
8. He was amazed when he the church.
had seen saw was seeing
9. The woman was in despair. Her child .
had disappeared disappeared has disappeared
10. I think that if Pete the secret nobody will find out anything.
keeps will keep is keeping.

1. Who after your garden lately? has looked has been looking looked
- The correct answer is "has looked". We use the present perfect tense ("has looked") to describe an action that happened in the past and is still relevant to the present. In this case, someone has recently looked after your garden.

2. I was late. My friends for me.
were already waiting had already been waiting already waited
- The correct answer is "had already been waiting". We use the past perfect continuous tense ("had already been waiting") to describe an action that started in the past and continued until another point in the past. In this case, your friends started waiting for you before you arrived.

3. What to him in the last few days?
happened has happened is happening
- The correct answer is "has happened". We use the present perfect tense ("has happened") to describe an action that started in the past and has relevance to the present. In this case, something has occurred to him in the last few days.

4. What time your classes ?
are starting do start will start
- The correct answer is "do start". We use the present simple tense ("do start") to describe a habitual or regular action. In this case, the classes have a regular starting time.

5. He his grammar for two hours yesterday.
has been practising was practising practised
- The correct answer is "was practicing". We use the past continuous tense ("was practicing") to describe an action that was ongoing in the past. In this case, he was practicing his grammar for two hours yesterday.

6. He his passport and couldn’t go away.
had lost has lost lost
- The correct answer is "had lost". We use the past perfect tense ("had lost") to describe an action that occurred before another past action. In this case, he had lost his passport and as a result, he couldn't go away.

7. He a word. The man a foreign language.
didn’t understand; didn’t understand; wasn’t understanding;
was speaking spoke was speaking
- The correct answer is "didn't understand; was speaking". We use the past simple tense ("didn't understand") to describe a specific action in the past, and the past continuous tense ("was speaking") to describe an ongoing action in the past. In this case, he didn't understand a word while the man was speaking a foreign language.

8. He was amazed when he the church.
had seen saw was seeing
- The correct answer is "saw". We use the past simple tense ("saw") to describe a specific action in the past. In this case, he was amazed when he saw the church.

9. The woman was in despair. Her child .
had disappeared disappeared has disappeared
- The correct answer is "had disappeared". We use the past perfect tense ("had disappeared") to describe an action that occurred before another past action. In this case, the woman was in despair because her child had disappeared.

10. I think that if Pete the secret nobody will find out anything.
keeps will keep is keeping
- The correct answer is "keeps". We use the present simple tense ("keeps") to describe an action that is a general truth or a habitual action. In this case, the sentence expresses a conditional situation where if Pete keeps the secret, nobody will find out anything.