精英家教網 > 初中英語 > 題目詳情
—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，故用被動結構：be + done,含有情態動詞的被動結構：情態動詞+ be + done，結合句意及句子結構，故選D
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