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传染病发生后应采取哪些措施

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I’m sorry to have kept you ________ for a long time.

A. waiting
B. waited
C. to wait
D. to waiting

The workers were busy ________ new houses throughout the winter.

A. build
B. to build
C. building
D. built

He couldn’t help ________ when he heard the sad news.

A. to cry
B. crying
C. cried
D. cry

Our TV set doesn’t work. I think we’ll have it ________ tomorrow.

A. repairing
B. repair
C. repaired
D. being repaired