题目内容
Some of you may have finished unit one. _______, you can go on to unit two.
A.if you may | B.if you do | C.if not | D.if so |
D
解析

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题目内容
Some of you may have finished unit one. _______, you can go on to unit two.
A.if you may | B.if you do | C.if not | D.if so |
D
解析