Some of you may have finished unit one.________，you can go on with unit two.
| A．If you may |
| B．If you do |
| C．If not |
| D．If so |
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Some of you may have finished unit one.________，you can go on with unit two.
| A．If you may |
| B．If you do |
| C．If not |
| D．If so |
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