单项选择题

But for your help, ______.

A．we couldn't have finished the task
B．we have finished the task
C．we could have finished the task
D．we had finished the task
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单项选择题
Can I speak to Cathy please（）

A．Speaking please.
B．Good idea.
C．I hope so.
D．I will.
单项选择题
What did you think of the lecture（）

A．It lasted two hours.
B．It was very interesting.
C．Yes, I’m very glad.
D．No, It’s too late.
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