题干
Peter is ten years old. He is _______ to go to school.
A：old enough
B：enough old
C：young enough
D：enough young
答案(点此获取答案解析）
A
Peter is ten years old. He is _______ to go to school.
A：old enough
B：enough old
C：young enough
D：enough young
中，自变量
的取值范围是 （ ）