问题
选择题
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
答案
答案：B
搜题请搜索小程序“爱下问搜题”
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
答案：B