Question

【题目】I left my umbrella in my room. Could you wait here _________ I go back to get it?
A.when
B.if
C.while
D.before

Answer 1

【答案】A
【解析】句意："我把雨伞忘在房间里了。在我回去拿的时候，你能在这儿等一会儿吗？"A"当"；B"如果"；C"当......时候"；D"在......之前"。When可加短动作和长动作；while加长动作。go back是短动作。故选A。