本能中心的三种号码根据()进行分类。
A.对恐惧的处理
B.对感觉的处理
C.对头脑的使用
D.对愤怒的处理方式
参考答案:D
With his parents keeping _________ close watch on him, he has no idea how to have _________
access to the Internet.[ ]
A. /; /
B. a; /
C. a; an
D. /; the