He            carefully but he could not            his teacher clearly.        
[     ]
A. heard; listen        
B. listen; hear        
C. listened;  hear        
D. heard;  listened
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科目：初中英語(yǔ) 來(lái)源：重慶市南開中學(xué)2012屆九年級(jí)下學(xué)期期中考試英語(yǔ)試題 題型：033

句型轉(zhuǎn)換。根據(jù)所給提示完成句子。每空一詞，含縮略詞。

He did his homework carefull．(改為否定句)

He ________　________ his homework carefully．

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