问题
选择题
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
答案
答案：D
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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
答案：D