【題目】It’s not easy for primary students ______ themselves freely in class.

A. express B. to express

C. expressing D. expressed

【答案】B

【解析】

試題分析：句意：對小學(xué)生來說在課堂上自由表達(dá)自己。根據(jù)題干分析此句中it是形式主語，后面要用不定式做真正的主語，所以應(yīng)選B。

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