题目内容：

24.I want to know _________ Jack still lives in that house.
A.that B.if C.weather D.where

优质解答

这题选if表示是否如果把weather换成whether也对if和whether都可译为\"是否\",二者引导宾语从句时通常可以互相替换,口语中多用if代替whether.例如：Ask if/whether he plans to come to the meeting.而以下几种情况中...