Question

It’s wise _______ you _______ your child at home alone while it’s also very important _______ him to learn to protect himself.

A．of, to leave, of	B．of, to leave, for
C．for, leave, for	D．for, leave, of

Answer 1

B

wise修饰人 第一空用of；it是形式主语，不定式to leave是真正的主语；important修饰to learn to protect himself这件事，用for。选B。