It ____ be hot in the summer.

A. can
B. couldn’t
C. can’t

–Who is the man over there? Is it Mr. Li?

A. No, it ______ be him. Mr. Li is much taller.
B. mustn’t
C. could not
D. can’t

--- Could I sit here?

A. -Yes, of course you _______.
B. can
C. could
D. must

It is lucky for him to _____ get the job.

A. be able to
B. could
C. can

I _____ promise you anything.

A. cannot
B. canot
C. could’not

He ____ swim and I ____ dance.

She ____ read and draw, but she _____write five years ago.

Tim ____ play football when he was eight.

I ____ use mobile phone until I was fifteen years old.

What ____ you do three years ago?