【題目】Generally, students' inner motivation with high expectations from others ______ essential to their development.
A.is
B.are
C.was
D.were

【答案】A
【解析】句意:一般認(rèn)為,其他人對(duì)學(xué)生高的期望是他們發(fā)展的必要的內(nèi)部動(dòng)機(jī)。本句主語(yǔ)是“motivation”,所以謂語(yǔ)動(dòng)詞用單數(shù),而且是一般情況,所以用一般現(xiàn)在時(shí),選A。

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