题目

一 I think students should have mobile phones to call their parents.一 ______. They often use them to play games instead. A . I hope so B . I don't agree C . No problem 答案：B下列动物的精彩表演中属于先天性行为的是A．小狗做算术B．老虎钻火圈C．孔雀开屏D．猴子走钢丝