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        1. —How often do I need to feed the fish?
          -They      food every day, or they will be hungry.
          A.must giveB.mustn’t giveC.mustn’t be give.D.must be given
          D

          試題分析:句意:你多久喂一次魚?他們每天都必須被喂食,否則他們會餓。主語they指魚,是動作的承受者,故用被動結(jié)構(gòu):be + done,含有情態(tài)動詞的被動結(jié)構(gòu):情態(tài)動詞+ be + done,結(jié)合句意及句子結(jié)構(gòu),故選D
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