单项选择题

You ______ to have done silly things.

A. had ought
B. hadn’t ought
C. didn’t ought
D. ought not
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He promised me a letter; he ought to ______ it days ago.
A. be written
B. have written
C. be writing
D. write
单项选择题
I ______ everything by the time you get back next week.
A. shall finish
B. have finished
C. will be finishing
D. shall have finished
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