We were sad to learn that several students were by a car yesterday.
A. hit out
B. knocked over
C. run across
D. picked up
网友回答
A. hit out
(答案→)B. knocked over
C. run across
D. picked up
解析：词义辨析。hit out抨击；knocked over撞倒，撞翻；run across偶然发现，撞见；picked up拾起，捡起，用车接。句意：我们很难过的得知昨天几个学生被一辆汽车撞倒了。所以选B。