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They peasants did what they____ the crops, but failed.
A．could saveB．could savingC．could to saveD．could saved
C
考查句子結(jié)構(gòu)。從句what they could(do)作動(dòng)詞did的賓語，不定式to save the crops作全句的目的狀語。防止誤選A.
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