题目内容

--- Could I sit here?

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

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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.

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