keep to后面加什么

　　You've got to keep to the speed limit

　　你必须遵守限速规定。

　　You should always keep to the speed limit.

　　什么时候你都不得超过最高速度限制。

　　Keep to the nearside lane.

　　不要偏离左边的`车道。

　　Let's keep to the subject, or you'll get me too confused.

　　别跑题，否则你会把我搞糊涂的。

　　He had been unable to keep to his schedule.

　　他没能遵循自己的计划。