___ in the regulations is that you ___ other people the password of your e-mail account.    
A.What is required; not tell              B As is required; shouldn't tell
C.It is required; not tell                D.It requires; shouldn't tell
A

試題分析:句意:在制度中你所被要求的就是你不應(yīng)該告訴別人你的郵件密碼。what為所字機(jī)構(gòu),作為主句的主語(yǔ),即為主語(yǔ)從句,is之后為表語(yǔ)從句,句中有require要求,表語(yǔ)從句用虛擬語(yǔ)氣should +動(dòng)詞原形,should可以省略,故選A
點(diǎn)評(píng):名詞性從句分為主語(yǔ)、賓語(yǔ)、表語(yǔ)、同位語(yǔ)從句四種,同位語(yǔ)從句和定語(yǔ)從句的區(qū)別在于:that作為關(guān)系代詞,可以引導(dǎo)定語(yǔ)從句,充當(dāng)句子成分,在從句中作賓語(yǔ)時(shí)可以省略; that引導(dǎo)同位語(yǔ)從句時(shí),起連詞的作用,沒(méi)有實(shí)際意義,不充當(dāng)句子成分,一般不能省略。
試比較下面兩個(gè)例句:
I had no idea that you were here.(that引導(dǎo)同位語(yǔ)從句,不能省略)
Have you got the idea(that)this book gives you of life in ancient Greece?(that引導(dǎo)定語(yǔ)從句,作賓語(yǔ),可以省略)
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