1. He too long and got a headache. studied was studying had been studying

2. you the concert at 5?

have heard were hearing did hear

3. I wonder if they in time.

come will come are coming

4. He married three times when he young.

has got; was had got; was got; was

5. By that time she any more explanations, she everything.

didn’t need; hadn’t needed; had understood didn’t need; understood

had understood

6. How long you this information?

have had do have have been having

7. He a word yet since he .

hasn’t said; has come hasn’t said; came hasn’t been saying; came

8. My friends and I to the cinema this Saturday.

go will go are going

9. I’ll tell him the truth as soon as he me.

will ask ask asks

10. We the book during several lessons and an essay.

discussed; wrote had been discussing; wrote were discussing; wrote

1. The correct answer is "was studying." We use the past continuous tense ("was studying") to describe an action that was happening at a specific moment in the past.

2. The correct answer is "did hear." We use the past simple tense ("did hear") when we want to talk about a completed action in the past.

3. The correct answer is "will come." We use the future simple tense ("will come") to talk about an action that will happen in the future.

4. The correct answer is "had got; was." We use the past perfect tense ("had got") to show that an action was completed before another action in the past. In this case, getting married three times happened before he was young.

5. The correct answer is "didn’t need; had understood." The question is asking about the past, so we need to use the past simple tense ("didn't need") to talk about not needing something. The second part of the sentence also refers to the past and should use the past perfect tense ("had understood") to show that she understood everything before that time.

6. The correct answer is "have had." The question asks about the present perfect tense, which uses "have/has + past participle." In this case, the past participle is "had."

7. The correct answer is "hasn’t said; came." The first part of the sentence is about a present tense action, so we use the present perfect tense ("hasn't said") to show that he hasn't said a word yet. The second part of the sentence is about a past action, so we use the past simple tense ("came").

8. The correct answer is "are going." The sentence is talking about a future plan, so we use the present continuous tense ("are going").

9. The correct answer is "ask." The verb "tell" is followed by an object pronoun (him), so we need to use the base form of the verb ("ask").

10. The correct answer is "discussed; wrote." The sentence is talking about two past actions, so we use the past simple tense ("discussed") and the second action happened after the first action, so we use the past simple tense ("wrote").