根据中文提示，完成句子。

1. 我发现这里布置的家庭作业不像我以前在原校时那么繁重.

    I found that the homework was not as heavy ___ ____ I used to get in my old school.

2. 她一进房间便坐下来看书.

____ ____ the room, she sat down and began to read.

3. 爸爸说他给我买了一辆新自行车.我迫不及待地要回家看看.

    Dad says he's bought me a new bike. I ___ ___ to go home and see it.

4. 妈妈和爸爸外出度假,比预期的时间提前一天返回家中.

    Mom and Dad arrive back from vacation a day earlier ____ ____.

5. 很多青少年感到孤独,好像没有人理解他们以及他们正在经历的变化.

    Many teenagers feel lonely, as if no one understands them and the changes they are ____ ____.

汽车行驶里程接近大修里程时，最高车速有何变化？