Be careful when you cross the road in rush hours so as to avoidby a carA. being knocked d

问题补充：

Be careful when you cross the road in rush hours so as to avoidby a car．

A. being knocked down

B. knocking down

C. to be knocked down

D. to knock down

答案：

(答案→)A. being knocked down

B. knocking down

C. to be knocked down

D. to knock down

解析：考查非谓语动词作宾语的用法。Avoid后只接doing，且knock down 与其逻辑主语you 是被动关系，要用being knocked down,故选A。句意：在上下班高峰期过马路时你要小心，以免被车撞了。