【正文】 the centre of our planetary system was a difficult concept to grasp in the Middle Ages. A.It。 C. whom【答案】 D 【解析】【分析】句意：我們都知道，那位老科學(xué)家，過(guò)去生活很艱苦，到了八十多歲還在努力工作。需要注意賓語(yǔ)從句的時(shí)態(tài)。D.C.C. what。19．_________ is known to all is that the earth is smaller than the sun. A.AsWaterwill where does he livethat can I pass the exam or notB.【點(diǎn)評(píng)】考查表語(yǔ)從句。27．The school library is ________ we can read many books and magazines. A.28．—I39。B.但是我不知道去哪里？——巴黎如何？ to go什么時(shí)候去， to go去哪里， to do做什么。 if【答案】 B 【解析】【分析】句意：你來(lái)不來(lái)無(wú)關(guān)緊要。故選D。that。doesn39。we can read many books and magazines修飾主語(yǔ)，是一個(gè)表語(yǔ)從句。It是形式主語(yǔ)，真正的主語(yǔ)是后面how引導(dǎo)的從句，為主語(yǔ)從句。D.25．You have spent too much time playing puter 39。所以選B。B. Wonder：對(duì)……感到疑惑，想知道，后常跟一個(gè)含有“疑問(wèn)”意義的賓語(yǔ)從句，B錯(cuò)。Festivalcelebrate 【點(diǎn)評(píng)】考查名詞性從句，本題涉及what引導(dǎo)的主語(yǔ)從句。C. WhatD.As。14．It wasC.13．______excited Jenny most was ______ she finally succeeded in ______seemed to be the most difficult exam to him. A.C. whatwhetherB.C.9．______ amazed the NBA world is ______ Kobe Bryant scored 81 points just in one game. A.D. 【點(diǎn)評(píng)】考查名詞性從句，本題涉及what引導(dǎo)的主語(yǔ)從句。第一空處為主語(yǔ)從句，從句缺少主語(yǔ)，需用what引導(dǎo)；第二空所在句子是個(gè)定語(yǔ)從句，先行詞為整個(gè)主句的內(nèi)容，從句中缺少主語(yǔ)，需用which引導(dǎo)。That。Being the sun and not the earthD.B. whomhas been announcedC.what【答案】 D 【解析】【分析】本題中含有一個(gè)主語(yǔ)從句what made matters worse，其中的what引導(dǎo)起這個(gè)主語(yǔ)從句，同時(shí)在主語(yǔ)從句中做主語(yǔ)。AsWhat, thatWhat, what【答案】 B 【解析】【分析】句意：使NBA世界驚訝的是Kobe Bryant在一場(chǎng)比賽中得了81分。What【答案】 D 【解析】【分析】句意：學(xué)習(xí)英語(yǔ)中最重要的是有足夠的練習(xí)。how【答案】 B 【解析】【分析】句意：土豆被引進(jìn)歐洲具體的事件不被確定，但是可能是在1565年左右。 thatD.What。What。 what he said做主語(yǔ),主語(yǔ)從句中said缺賓語(yǔ)用what補(bǔ)足，故選B。D.which17．—What impresses you most when you visit the Acropolis ? — ________ it is that has brought the grand palace into today39。is known to all is that the earth is smaller than the sun. A. 【點(diǎn)評(píng)】考查名詞性從句，本題涉及what引導(dǎo)的主語(yǔ)從句。ThatwhatYear39。 【點(diǎn)評(píng)】考查Whether引導(dǎo)的名詞性從句。B.that。 regard【答案】 A 【解析】【分析】句意：—醫(yī)生，看起來(lái)你喜歡和動(dòng)物一起工作。It。30．______ ma