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是壞消息?!军c評】主語從句屬于名詞性從句,在名詞性從句中,that無實義,只起連接作用,不做句子成分;if/whether起連接作用,不做句子成分,有實義“是否”。9.______ is our belief that improvements in health care will lead to a stronger, more prosperous economy. A.B.C.D.that引導的是主語從句,故空格處應該用it作形式主語,代替真正的that引導的主語從句?!军c評】考查it的用法,以及主語從句的應用。thatitwhatwhich【答案】 C 【解析】【分析】句意:他們在森林里迷路了,更糟糕的是天開始黑了。that不能在句中作成分;it不能引導主語從句;which意為“哪一個”,不符合本句語境。故選C。11.________ has been proved is that animals and insects have their own languages. A.AsC.That【答案】 A 【解析】【分析】句意:已被證明的是動物和昆蟲有自己的語言。選A。12.____________ matters most in learning English is enough practice. A.B.C.D.A. why為什么;B. that引導名詞性從句只起引導詞作用,不充當成分;C. which哪一個;D. What什么。故答案選D。主語從句屬于名詞性從句的一種,填哪個連接詞要分析從句缺少什么成分,然后確定所選的詞。what。that。that。what。第一空主語從句中缺少主語,指代事情,故用what。故選D。14.While some behaviors may seem strange to you, remember you consider normal probably seems just as unusual to others. A. thatwhat。C. whatwhich。第一空為賓語從句,從句結構完整用that起連接作用,第二空為主語從句,從句中consider缺少賓語,應該用what,故選C。15.______ will be in charge of the meeting has not been decided yet. A.WhichC.Who【答案】 D 【解析】【分析】句意:誰將負責這次會議還沒有決定。 【點評】考查名詞性從句,本題涉及who引導的主語從句。it39。B.C.D.固定句式:主+find+it+adj+to do,主語發(fā)現(xiàn)做某事是……的,故選C。17.______ has caused great confusion is ______ he made it without anyone else39。What。What。It。It。表示“讓人困惑的事情”用what引導主語從句,表示“如何做到的”用how表方式,引導表語從句。18.It was never clear ________ the man hadn39。thatB.whenD.It在句中是形式主語,真正的主語是why引導的主語從句。 【點評】考查名詞性從句,本題涉及why引導的主語從句。s send him home. Do you know _________? I have no idea.A.where he livesC.he lives where【答案】 B 【解析】【分析】句意:讓我們把他送回家。賓語從句就是一個句子作動詞或介詞的賓語。在賓語從句中只能使用陳述句語序,不能用疑問句語序。20.You will never guess ________.A.what has happenedC.D.賓語從句用陳述句語序,故A、C、D錯,happen的主語是所發(fā)生的事情,其結構是:sth