问题
单项选择题
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
参考答案：D
解析：
本题考查省略句的用法。If so=If you have done that/SO。
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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
参考答案：D
解析：
本题考查省略句的用法。If so=If you have done that/SO。