问题
选择题
We _______ basketball on the playground when it _______ to rain. [ ]
A. played, began
B. were playing, began
C. played, was beginning
D. were playing, was beginning
答案
答案：B
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We _______ basketball on the playground when it _______ to rain. [ ]
A. played, began
B. were playing, began
C. played, was beginning
D. were playing, was beginning
答案：B