【題目】Scientists study ____ human brains work to make computers.
A.when
B.how
C.that
D.whether

【答案】B
【解析】本題考查賓語從句。句意:科學(xué)家為了制造計(jì)算機(jī)研究人腦如何工作.!癬___ human brains work”在句中作賓語,是一個賓語從句,分析賓語從句的結(jié)構(gòu),可知此從句缺少狀語,故填關(guān)系副詞,修飾work,根據(jù)句意可知how合題意。

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