【正文】
故選B。how【答案】 B 【解析】【分析】句意:土豆被引進歐洲具體的事件不被確定,但是可能是在1565年左右。C.when30.Exactly _________ the potato was introduced into Europe is uncertain, but it was probably around 1565. A.故選C。本題考查表語從句,;……時候;;。D.C.B.29.Pay no attention to those who laugh at you. What matters most is ________ you see yourself. A.故選A。It seems + that從句,其中it 是形式主語,that引導主語從句?!堑摹hat。 be regardedC.what。 regard28.— Doctor, it seems ______ you like to work with animals.— Yes, we should________ animals as our friends.A. It seems that...好像,似乎,that引導的主語從句,it為形式主語;love to do ... 根據(jù)句意故選A 。D.seems,loveB.seems,lovesto laugh. that everyone 【點評】考查學生對特殊疑問句做賓語從句的熟練應用27.It 特殊疑問句做賓語從句應用陳述語序:特殊疑問詞+主語+謂語+其他。我不記得我放在什么地方了。D.where I put themB.t remember ___________.A.所以選B。賓語從句由特殊疑問句變來就用原來的疑問詞作引導。你知道他住在哪里嗎?我不知道。D.he where livesB.where does he live 【點評】it是人稱代詞,在句子中可以做形式主語,形式賓語,這是經(jīng)??疾斓膬热?平時應注意總結,加強練習.25. Let39。句意:能算出這道難題,你真是太聰明了。It39。 to work【答案】D 【解析】【分析】it可指代下文內容做形式主語,其主要有兩種形式:It39。D. workingC. workingB. to work24.It is clever ______ you ______ out the problem. A.復合句的主語是一個名詞性從句,從句沒有引導詞和主語,表示“所……的(事)”,故用what引導,其雙重作用,故選B。D.C.B.23._________ is known to all is that the earth is smaller than the sun. A.is known to all 是主語從句,從句中缺少主語,因此用what,選B。 Which【答案】 B 【解析】【分析】句意:眾所周知地球比太陽小。ItWhatAs 【點評】考查名詞性從句,本題涉及that引導的主語從句。分析句子可知,整個句子為主系表結構,was為系動詞,它之前的都為主語,且主語由句子來充當,句子結構以及句意完整,所以連詞代詞為that。Being the sun and not the earthD.s the sun and not the earthB.21.________ is the centre of our planetary system was a difficult concept to grasp in the Middle Ages. A. 【點評】考查主語從句。That【答案】 A 【解析】【分析】句意:造成事故的原因還沒有查明。C.Which20._______ caused the accident has not been found out yet. A.分析句子結構可知,第一空為主語從句,從句中缺少主語,所以用what,第二空為同位語從句,從句結構完整,所以用that解釋promise的內容,故選B。What。As。What。It。 【點評】考查名詞性從句,本題涉及that引導的主語從句和what引導的賓語從句。about是介詞,其后是個句子故應填