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s. However,grades have a direct connection with future success is still a question.A. whetherfocused。C. whetherhas focused。根據(jù)In the past decade,在最近的幾十年里,可知句子用現(xiàn)在完成時態(tài),our education system是句子的主語,單數(shù)形式,所以第一空填has focused;第二空是主語從句做主語,if是否,不能引導(dǎo)主語從句,所以第二空填whether。【點(diǎn)評】主語從句主要有三類:1)(1)由連詞that引導(dǎo)的主語從句:引導(dǎo)詞that無含義,在句中不做成分,不可以省。(2)用連詞 whether 引導(dǎo)的主語從句:whether有含義(是否),在句中不做成分,不可以省。t matter too 。2)用連接代詞引導(dǎo)的主語從句(在由連接代詞who, whose, whom, which, what, whoever, whomever, whichever, whatever引導(dǎo)的名詞性從句中,其連接代詞在句中起名詞性作用,擔(dān)當(dāng)一定成分).例如:What you need is more 。)例如:Where we should leave it is a problem.9.Located between the 16th and the 18th floor, ______ I call my “home” is more like a “bird39。whichB.whatD.What引導(dǎo)主語從句______ I call my “home”且故選C。what。B. thatit。D. because【答案】 A 【解析】【分析】考查名詞性從句的連接詞。11.________ the weather will not clear up until next week is bad news for us. A.B.C.D.句意:直到下周天氣才放晴,這對我們來說是壞消息?!军c(diǎn)評】主語從句屬于名詞性從句,在名詞性從句中,that無實(shí)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(shí)義“是否”。12.________ we may find interesting is that it usually takes more to be polite. A.B.C.D.此處是主語從句做主語,從句沒有引導(dǎo)詞,缺少賓語,故答案為B。13.______ is our belief that improvements in health care will lead to a stronger, more prosperous economy. A.B.C.D.that引導(dǎo)的是主語從句,故空格處應(yīng)該用it作形式主語,代替真正的that引導(dǎo)的主語從句。【點(diǎn)評】考查it的用法,以及主語從句的應(yīng)用。he said that。B. thatthat。D. that【答案】 B 【解析】【分析】句意:正是他說的話讓我很失望。 what he said做主語,主語從句中said缺賓語用what補(bǔ)足,故選B。15.________ his failure lies is expected ________ clear to us. A.B.C.D.分析句子可知,主語從句中的lie為不及物動詞,所以主句中缺少狀語,因此填where。make sth. clear to sb為固定搭配,意為“向某人闡明某事,使某人弄清某事”。因此選C。16._______ has not been decided next. A.B.C.D.根據(jù)助動詞has可知前面是主語,what to do為名詞性從句,可做主語,故選B。17._______is known to us all is that Johnson broke his promise ______ he would e to help me as soon as possible. A. thatB. thatC. whichD. which【答案】 B 【解析】【分析】句意:我們都知道,Johnson違背了他會盡快來幫助我的諾言。 【點(diǎn)評】考查名詞性從句,本題涉及主語從句和同位語從句。WhatB.The thingD.此處為主語從句,從句中缺少主語,