—Isn't that Ann's husband over there?

—No, it       be him-I'm sure he doesn't wear glasses.  [ ]

A. can't

B. must not

C. won't

D. may not

下列反射不属于条件反射的是（　　）

A．一朝被蛇咬十年怕井绳

B．蜘蛛结网

C．看到西红柿流唾液

D．小孩听到动画片的音乐就来劲