________ in the school regulations that students should not wear long hair or jewels.
A.It is requiredB.What is required
C.What requiresD.It required
A

試題分析:句意:學(xué)校制度規(guī)定學(xué)生不允許留長(zhǎng)發(fā)和戴首飾。這里It是形式主語(yǔ),真正的主語(yǔ)是that引導(dǎo)的從句,主語(yǔ)與require之間是被動(dòng)關(guān)系,故選A。
點(diǎn)評(píng):本題難度適中。在句中作主語(yǔ)的名詞性從句稱為主語(yǔ)從句, 主語(yǔ)從句所對(duì)應(yīng)的謂語(yǔ)動(dòng)詞通常用第三人稱單數(shù)的形式。為了整個(gè)句子的平衡, 主語(yǔ)從句經(jīng)常后置, 并用it充當(dāng)形式主語(yǔ)(此時(shí), that引導(dǎo)的主語(yǔ)從句若不放在句首, 可以省略引導(dǎo)詞that)。it作形式主語(yǔ)代替主語(yǔ)從句主要是為了平衡句子結(jié)構(gòu), 主語(yǔ)從句的連接詞沒(méi)有變化。
即學(xué)即練:________ whether it will do us harm or good.
A. It remains to be seen                  B. What remains to be seen
C. What remain to be seen                   D. It remains to see
解析:A。句意:它對(duì)我們是利是害,還得看看再說(shuō)。
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