单项选择题

You ______ able to speak English so well if you hadn't been practising hard.

A. are not
B. can not be
C. wouldn't be
D. would have been
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单项选择题
I'm very ______ to you for your help.
A. grateful
B. agreeable
C. pleased
D. satisfied
单项选择题
Susan is not very intelligent, ______ work very hard.
A. not does she
B. or does she
C. either does she
D. neither does she
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