It’s very dangerous _ children to cross the busy street.A. forB. ofC. toD. by

问题补充：

It’s very dangerous _ children to cross the busy street.

A. for

B. of

C. to

D. by

答案：

A. for

B. of

C. to

D. by

解析：考查介词。句意对于孩子们来说，穿过马路是十分危险的。考查itis adj for sb to do sth ,对于 某人来说做某事是…。For sb对于某人来说，it 做形式主语。所以选A项。