【題目】When the haze got more serious, the students had ________ on the Internet at home.

A.to learnB.learnedC.learningD.learn

【答案】A

【解析】

句意:當(dāng)霧霾變得更嚴(yán)重時(shí),學(xué)生們不得不在家里上網(wǎng)學(xué)習(xí)。

考查固定搭配。A. to learn(不定式);B. learned(一般過去式、過去分詞); C. learning(現(xiàn)在分詞、動(dòng)名詞);D. learn(原形); 從文字表層意思推斷,空格指“不得不在家上網(wǎng)學(xué)習(xí)have to do sth意為不得不做某事;故選A。

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