Itisreallycrazy
问题详情：
It is really crazy ________ Peter to let his ________ son swim alone in the river.
A. for; 5 years old B. of; 5 years old
C. for; 5-years-old D. of; 5-year-old
【回答】
D
知识点：构词法
题型：选择题
问题详情：
It is really crazy ________ Peter to let his ________ son swim alone in the river.
A. for; 5 years old B. of; 5 years old
C. for; 5-years-old D. of; 5-year-old
【回答】
D
知识点：构词法
题型：选择题
