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
网友回答
A. of, to leave, of
(答案→)B. of, to leave, for
C. for, leave, for
D. for, leave, of
解析：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。