如果你的父亲有个不好的生活习惯，请描述并给出合理建议。（补充句子，每句1分）

My father has a    小题1: _  habit. He hardly ever     小题2: __.He always drives his car to work, he never      小题3:  _.He often       小题4:  _when he gets back from work..I think he should    小题5:     .

按规定，堆石坝坝体垫层区要求压实后其渗透系数为( )左右。

A．5^-3cm/s

B．10^-3cm/s

C．12^-3cm/s

D．15^-3cm/s