Helen hurt her leg while _____ on the playground. We had to send her to the hospital. [ ]A. played B

题目简介

Helen hurt her leg while _____ on the playground. We had to send her to the hospital. [ ]A. played B

题目详情

Helen hurt her leg while _____ on the playground. We had to send her to the hospital.      
[     ]
A. played            
B.  playing      
C. was playing        
D. is playing
题型:单选题难度:中档来源:同步题

答案

B

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