【題目】What the children in the mountain village need ________ good books.

A. is

B. are

C. have

D. has

【答案】B

【解析】 what 引導(dǎo)的主語從句作主語時，謂語動詞要根據(jù)后面的名詞的數(shù)來決定，此處要用非 第三人稱單數(shù)形式。

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