根据上下句意思补全对话。

A: Tom. You have a big family. We want to know about your family.

B: OK.

A: When do you ____?

B: I run in the morning.

A: ____ ____ does your brother run?

B: He runs at 7:00. But my father runs ____ ____ ____(在下午) .

A: Does your sister go to school?

B: Yes. She ____ ____ ____ ____ 8:00.

根据短文理解，回答问题

    Many students in the USA always take the school bus to school every day. Parents think taking the school bus is very safe. But sometimes it is also dangerous (危险的). Some students die (死亡) because they don't follow the school bus rules. Here are some school bus rules:

◆Arrive at the bus station early.

◆Wait for the bus at the bus station.

◆Don't play around (在周围) the bus.

◆Don't run everywhere at the bus station.

◆Don't walk or run in the bus when it is going.

◆Don't try to leave the bus before it stops.

These rules are good for students. Remember them and follow them. So you can keep yourself safe.

膀胱里的尿液积存到一种程度时，会通过输尿管排到体外．　

-0.5的倒数是(        )

在美国，学生课本重复使用，一本教科书平均寿命五年；在韩国，一次性台布、洗刷用品早已没有踪影；在日本，发明了一次性筷子，但严禁砍伐本国树木做筷子。这给我们的启示是 （  ）    
① 必须节约资源           ②必须发展生产力 
③必须实施可持续发展战略  ④ 坚持对外开放