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One of the requirements for the experiment is that the material _____ to its burning temperature.
A.is heatedB.will be heatedC.be heatedD.would be heated
C

試題分析:考查虛擬語氣:主語是requirements的時候,表語從句中用虛擬語氣,sb (should) do,還有the material和heat是被動關系,用(should) be heated,句意:實驗的一個要求是材料要被加熱到沸點。選C。
點評:英語中有4——四個表示“要求”的詞,require, ask ,tell, demand;3——三個表示“建議”的詞,suggest, recommend, advice;2——兩個表示“命令”的詞,order,command ; 1——一個表示“堅持”的詞,insist。他們后面接 should+動詞原形 的虛擬語氣。Should可以省略。另外這些詞的名詞,后面的同位語從句和表語從句都是用虛擬語氣。
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