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
省略句的用法。If so=If you have done that/so.
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题目内容
| A.If you may | B.If you do |
| C.If not | D.If so |