Any employee working late on a Friday must remember to turn off all computer equip-ment __________ leaving for the night.A.thenB.untilC.beforeD.because
Any employee working late on a Friday must remember to turn off all computer equip-ment __________ leaving for the night.
A.then
B.until
C.before
D.because
B.until
C.before
D.because
参考解析
解析：“before”有“在……之前”的意思。
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