题目内容:
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
参考答案:
答案解析:
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