Do not leave the room __you have finished the test.答案是before.请问可以填unless,或until吗?

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Do not leave the room __you have finished the test.答案是before.请问可以填unless,或until吗?
Do not leave the room __you have finished the test.答案是before.请问可以填unless,或until吗?

Do not leave the room __you have finished the test.答案是before.请问可以填unless,或until吗?
可以用until
当主句谓语动词为短暂性动词的否定形式时或延续性动词的肯定时可以用until

可以的

可以的。
not until 直到……才
unless 除非