问题
选择题
Mike stopped _____ when he _____ a strange noise. [ ]
A. listening; heard
B. to hear; listened to
C. to listen; heard
D. hearing; listened
答案
答案：C
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Mike stopped _____ when he _____ a strange noise. [ ]
A. listening; heard
B. to hear; listened to
C. to listen; heard
D. hearing; listened
答案：C