Don't come into the lab （A.unless） you are asked to.
如果沒有叫你的話,就不要進這間實驗室.
unless,除非,相當于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
英語人氣：794 ℃時間：2020-02-05 23:12:52
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