【題目】The teacher said that they ______ hard-working students.

A. is B. are C. were D. was

【答案】C

【解析】試題分析：句意“老師說(shuō)他們是很刻苦的學(xué)生。”賓語(yǔ)從句的時(shí)態(tài)必須與主句保持一致。主句用的said，是過(guò)去式，故從句也用過(guò)去式，排除A、B；從句主語(yǔ)they是復(fù)數(shù)，故謂語(yǔ)也用復(fù)數(shù)，排除D。

故選C。

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