问题
选择题
— What _____ to the little baby a moment ago?
— He fell off the bed. [ ]
A. happens
B. happened
C. was happened
D. is happening
答案
答案：B
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— What _____ to the little baby a moment ago?
— He fell off the bed. [ ]
A. happens
B. happened
C. was happened
D. is happening
答案：B