单项选择题

I can hardly imagine Peter ______ across the Atlantic Ocean in 15 days.

A．sail
B．to sail
C．sailing
D．to have sailed
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单项选择题
She told me that she was then living in a ______.
A．two-stories wooden house
B．wooden two-story house
C．two-story wooden house
D．wooden house two storied
单项选择题
Without computers, much of the advanced technology______.
A．would not be achieved
B．would not be achieve
C．haven't achieved
D．would not have been achieved
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