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choose the right answer (logical assumptions/deductions/probabilit
1. i don't know for sure, but it be so.
a) may
c) can't
b) must
d) may not
2. this film be really good! all my friends like it.
a) could
c) must
b) might
d) may
3. kathrin o us! i am absolutely sure!
a) must have lied
c) might have lied
b) may have lied
d) could have lied
who has broken the vase? - i don't know. it
your cat. i saw it playin
room.
a) mightn't have been c) can have been
b) couldn't have been d) might have been
5. he have done that! it's impossible!
a) may not
c) can't
b) mustn't
d) mightn't
6. she be very rich! look at her marvelous dress!
a) must
c) might
b) may
d) can
7. i am not sure but we meet them at the party, let's go!
a) might
c) must
b) can
d) might have
8. he is walking to work! his car_ down again!
a) might have broken c) can have broken
b) must have broken d) could have broken
9. she this picture! she can't paint at all!
a) must have painted c) mustn't have painted
b) may have painted d) couldn't have painted
10. he is in antarctica now! - is he? it be freezing there!
a) must
c) may
b) can
d) might
choose the right answer (modals).
1. if you want to go to st petersburg, you do it in june.
a) must b) have to c) could d) should
2. must i finish the work today? - no you you may finish it tomorr
a) needn't b) can't c) mustn't d) shouldn't​

1. The correct answer is b) must. We can make this deduction because the speaker is saying that they don't know for sure, but it seems likely or probable that something is true. In this case, they are saying that they don't know for sure, but it seems likely that it is so.

2. The correct answer is c) must. We can make this deduction because the speaker is saying that all their friends like the film, which indicates a high probability that the film is really good.

3. The correct answer is b) may have lied. We can make this deduction because the speaker is saying that they are absolutely sure that Kathrin lied. However, they are not certain about the specific verb tense of the lie, so they use "may have" to indicate the possibility of the past action.

4. The correct answer is d) might have been. We can make this deduction because the speaker is saying that they don't know who has broken the vase. They are suggesting that it is possible that the cat broke it based on their observation of the cat playing in the room.

5. The correct answer is c) can't. We can make this deduction because the speaker is saying that it is impossible for him to have done that action.

6. The correct answer is a) must. We can make this deduction because the speaker is using the dress as evidence to support their assumption that she is very rich.

7. The correct answer is a) might. We can make this deduction because the speaker is saying that they are not sure if they will meet them at the party, but they suggest going just in case.

8. The correct answer is b) must have broken. We can make this deduction because the speaker is using the fact that he is walking to work as evidence to support their assumption that his car broke down.

9. The correct answer is d) couldn't have painted. We can make this deduction because the speaker is saying that the person in question is not capable of painting, so it is not possible for her to have painted the picture.

10. The correct answer is a) must. We can make this deduction because the speaker is using the fact that the person is in Antarctica as evidence to support their assumption that it is freezing there.

Bonus questions:

1. The correct answer is b) have to. We can make this deduction because the speaker is giving an instruction or stating a necessary requirement.

2. The correct answer is a) needn't. We can make this deduction because the speaker is saying that it is not necessary to finish the work today.