问题
选择题
If we _____ the tickets half a year ago, we would not be able to visit it on May Day now.
A．did not book
B．had not booked
C．would not book
D．would not have booked
答案
答案：B
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If we _____ the tickets half a year ago, we would not be able to visit it on May Day now.
A．did not book
B．had not booked
C．would not book
D．would not have booked
答案：B