问题
选择题
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
答案
答案：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。