单项选择题

He wrote the book in ______ with his wife.

A. proportion
B. installment
C. correspondence
D. collaboration
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单项选择题
______ from a distance, the island looked like a cloud.
A. Viewing
B. To view
C. Viewed
D. Being viewed
单项选择题
You've worked long and hard at your job, and it's about time you ______ able to see some financial rewards for it.
A. should be
B. were
C. must be
D. are
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