Question

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

A．being knocked down	B．knocking down
C．to be knocked down	D．to knock down

Answer 1

A

试题分析：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。