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