单选题
Before she could shout "look ______ "to the old man, he was run by a car coining from his left.
A、
back, on
B、
out, over
C、
up, down
D、
ahead, at
【正确答案】
B
【答案解析】
look out的意思是“小心”；run down的意思是“撞倒，撞翻”。
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