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that animals and insects have their own languages. A.WhatB.AsC.ItD.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。根據is判斷,此處為主語從句,分析該從句,缺少主語,用what。選A?!军c評】考查名詞性從句,本題涉及what引導的主語從句的應用。13.They lost their way in the forest, and ________ made matters worse was that night began to fall. A.itB.whichC.thatD.what【答案】 D 【解析】【分析】句意:他們在森林里迷路了,情況更糟糕的是天又黑了。本題中含有一個主語從句what made matters worse,其中的what引導起這個主語從句,同時在主語從句中做主語。故選D?!军c評】考查名詞性從句,本題涉及what引導的主語從句的應用。14.It was he said disappointed me. A.that。 whatB.what。 thatC.that。 whichD.which。 that【答案】 B 【解析】【分析】句意:正是他說的話讓我很失望。這是一個強調句型,it is/was that...是固定搭配,what he said是被強調部分, 你可以發(fā)現去掉it was that后, 句子仍然完整。 what he said做主語,主語從句中said缺賓語用what補足,故選B。 【點評】考查主語從句的強調形式。15.______ makes the school proud is ______ more than 90% of the students have been admitted to universities. A.what。 becauseB.that。 becauseC.that。 whatD.what。 that【答案】 D 【解析】【分析】句意:讓學校驕傲的是,超過90%的學生被重點大學所錄取。第一空主語從句中缺少主語,指代事情,故用what。第二空為表語從句,且從句中不缺少成分,故填關系詞that。故選D。 【點評】考查名詞性從句,本題涉及what引導的主語從句和that引導的表語從句。16.I found _______ convenient to shop on line at home. A.it39。sB.thatC.itD.that was【答案】 C 【解析】【分析】句意:我發(fā)現在家網購和方便。固定句式:主+find+it+adj+to do,主語發(fā)現做某事是……的,故選C。 【點評】考查it做形式賓語,熟練掌握固定句式:主+find+it+adj+to do。17._______ caused the accident has not been found out yet. A.WhatB.WhichC.The thingD.That【答案】 A 【解析】【分析】句意:造成事故的原因還沒有查明。此處為主語從句,從句中缺少主語,應該用what引導,故答案為A。 【點評】考查主語從句。以及what的含義。18.________ is the centre of our planetary system was a difficult concept to grasp in the Middle Ages. A.It39。s the sun and not the earthB.The sun and not the earthC.16