单项选择题

（） a binding contract last year and it is still valid.

A. We have signed
B. We haven’t signed
C. We signed
D. We had signed

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单项选择题
If I （） get back to London in time, I’ll definitely come.

A. can
B. could
C. would be able to
D. will be able to
单项选择题
I cannot sleep. The dog next door is making too much noise. I wish it （） quiet.

A. kept
B. would keep
C. had kept
D. to keep
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