题文
“When did he leave the classroom?” “He left _______ you turned back to write on the blackboard.”
| A.the time | B.the moment |
| C.until | D.since |
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“When did he leave the classroom?” “He left _______ you turned back to write on the blackboard.”
| A.the time | B.the moment |
| C.until | D.since |
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