You can't leave the workshop ____the machine is running.A.unless B.until C.while D.before

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You can't leave the workshop ____the machine is running.A.unless B.until C.while D.before
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You can't leave the workshop ____the machine is running.A.unless B.until C.while D.before
You can't leave the workshop ____the machine is running.
A.unless B.until C.while D.before

You can't leave the workshop ____the machine is running.A.unless B.until C.while D.before
C.
当机器在运行的时候,你不能离开车间.

B
not ... until ,直到。。才
你知道机器运行了，才能离开工作室
肯定对哦

C