Don't come into the lab (A.unless) you are asked to.
如果没有叫你的话,就不要进这间实验室.
unless,除非,相当于if not.
Don't come into the lab________ you are asked to.
Don't come into the lab________ you are asked to.
Don’t come into the lab ________ you are asked to.
A.unless B.until C.because D.since
Don’t come into the lab ________ you are asked to.
A.unless B.until C.because D.since
英语人气:122 ℃时间:2020-02-05 23:12:52
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