Thethieffrozeinfear
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- 關注:2.57W次
問題詳情:
The thief froze in fear _____ he heard footsteps _____ .
A. while; approaching B. while; approach
C. when; being approached D. when; approaching
【回答】
D
知識點:非謂語動詞
題型:選擇題
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