问题补充:
By the time the tornado ended, more than 2,000 people .
A. has injured
B. has been injured
C. had injured
D. had been injured
答案:
A. has injured
B. has been injured
C. had injured
(答案→)D. had been injured
解析:考察时态语态。By是完成时的标志,by后面跟什么时态,主句就用什么完成时,根据ended可知,主句用过去完成时,injure的用法是sb be injured,因此选择D