We have been collecting stamps for five years.(同义句转换)

We have been collecting stamps for five years.(同义句转换)

题目
We have been collecting stamps for five years.(同义句转换)
We _____ _____ stamps five years ago.
He finished writing a book last week.(对writing a book 提问)
_____ ______ he ____ _____ last week?
答案
began/started,collecting
what ,did,finish ,doing
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