题目内容
--- Who ________ paper in the world?
--- Cai Lun ________.
[ ]
A.invented; did
B.was invented; was
C.did invent; was
D.invented; was
答案:A
解析:
解析:
|
点拨: who是动作的发出者,用主动语态invented。下句使用did来替代invented。 |
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