I carefully but could nothing . A. listened ; hear B. heard ; listen C. listened ——青夏教育精英家教网——

摘要：I carefully but could nothing . A. listened ; hear B. heard ; listen C. listened to ; hear D. hear ; listen to

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I _______ carefully but could _______ nothing.

A. listened, hear
B. heard, listen
C. listened to, hear
D. hear, listen to

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I _____ carefully but could _____ nothing.

A. listened; hear
B. heard; listen
C. listened to; hear
D. hear; listen to

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I carefully but could nothing.

A. listened, hear B. heard, listen C. listened to, hear D. hear, listen to

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