问题详情:
The thief froze in fear _____ he heard footsteps _____ .
A. while; approaching B. while; approach
C. when; being approached D. when; approaching
【回答】
D
知识点:非谓语动词
题型:选择题
问题详情:
The thief froze in fear _____ he heard footsteps _____ .
A. while; approaching B. while; approach
C. when; being approached D. when; approaching
【回答】
D
知识点:非谓语动词
题型:选择题