The students pretended_______ attentively when the teacher came in.
A．to learnB．learningC．a(chǎn)nd learned D．to be learning
D
考察不定式的進(jìn)行時(shí),pretend to be doing,假裝正在做什么,句子的意思是學(xué)生們?cè)诶蠋熯M(jìn)來(lái)的時(shí)候假裝正在認(rèn)真學(xué)習(xí)，故選擇D
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