问题
By the end of the last month, I _____________ all the CDs of Justin Bieber.
A:collect
B:collected
C:have collected
D:had collected
B:collected
C:have collected
D:had collected
正确答案是：
同类题型
What are you going to do for the School Day？- We’ll _____ a new play.
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If something bad happens _____ you, please ring me up at once.[ ]
He did not for a minute to save the drowning child and jumped into the river immediately.