1. Can't be

2. Must have gone

3. Could rain / might rain

4. Might have gone / could have gone

5. Couldn't go

6. Couldn't have seen / can't have seen

7. Should get

8. Wouldn't recognize / might not recognize

9. Must have heard

10. Should have turned

1.

A : I'm hungry.

B : But you've just had lunch. You can’t_be______ hungry already. ( be )

2.

A : I haven't seen our neighbors for ages.

B : No. They _must_have_gone_____ away. ( go )

3.

A : What's the weather like ? Is it raining ?

B : Not at the moment but it _might_rain_____ later. ( rain )

4.

A : Where has Julia gone ?

B : I'm not sure. She could_have_gone______ to the bank. ( go )

5.

A : I didn't see you at John's party last week.

B : No, I had to work that evening, so I __couldn’t__go__. ( go )

6.

A : I saw you at John's party last week.

B : No, you didn't. You _ couldn’t _see_____ me. I didn't go to John's party. ( see )

7.

A : When did you post the letter to Mary ?

B : This morning. So she _is_going_to_get_____ it tomorrow. ( get )

8.

A : When was the last time you saw Bill ?

B : Years ago. I would_not__ recognize ____ him if I saw him now. ( recognize )

9.

A : Did you hear the explosion ?

B : What explosion ?

A : There was a loud explosion a few minutes ago. You _must_have_ heard____ it. ( hear )

10.

A : We weren't sure which way to go. In the end we turned right.

B : You went the wrong way. You _should_have_turned___ left. ( turn )