名词性从句练习50题目带有答案3页.doc

1.It is doubtful _ he knows it or not. A.that B.if C.what D.whether 2._that there is another good harvest this year. A.It says B.It is said C.This is D.He was told 3.Is this _looking for? A.you were B.that you were C.what were you D.what you were 4._we are doing has never been done before. A.That B.Which C.Whether D.What 5.She said that she _ there for two years. A.has worked B.had worked C.was