You…. be right but I am not sure, so I am going back to check anyway.
A.can
B.must
C.should
D.might

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.
A new law may soon be passed to deal with the problem.
A.There’s a possibility that a new law will soon be passed to deal with the problem.
B.It is said that a new law will soon be passed to deal with the problem.
C.To deal with the problem, a new law must be passed soon.
D.The problem will soon be dealt with by a new law.

It is possible that we won’t have to take an entrance exam this year.
A.Perhaps we mustn't take an entrance exam this year.
B.We mustn’t take an entrance exam this year.
C.We mightn’t take an entrance exam this year.
D.It is likely that we will take an entrance exam this year.

It would have been better if she had bought some sugar.
A.She should have bought some sugar.
B.She must have bought some sugar.
C.She might buy some sugar.
D.She might have bought some sugar.

You.... tell Linda anything about our story. She.... keep a secret.
A.had better not / cannot
B.needn’t / would rather not
C.ought to / would not
D.do not have to / should not

I am not really sure where Nhung is. She.... in the living room, or perhaps she is in the backyard.
A.could not sit
B.cannot sit
C.must be sitting
D.might be sitting

John…. speak three languages.
A.will
B.can
C.has to
D.must

With luck, tomorrow.... be a sunny day.
A.could
B.must
C.would rather
D.needn't

Dane ....the book we borrowed from the library. It was on the table, but now it has gone.
A.must have returned
B.should have returned
C.cannot have returned
D.needn’t have returned

When I was five years old, I.... read and write.
A.can
B.could
C.may
D.should