补全对话，每空一词。

A: Oh,dear, you   1    eat in the classroom.

B: I'm sorry. I'm a new exchange student here. I don' t know the   2    .

A: It doesn't matter.    3    careful next time.

B: Can we eat in school?

A: You can eat    4   the dining hall,but you can't eat in the classroom.

B: I see.Anything   5    ?

A: You can't arrive late    6     class. You can't listen     7    music in the classrooms or hallways.

     Especially you mustn't    8     in the hallways. You may hit others.

B: I remember now. Thanks. My name is Keiko.    9    Australia.

A: My name is John. Welcome   10    America.

某同学对一些物理量进行了估测，其中最接近实际的是                   (    )

A．人体正常体温约为42℃

B．某初中生的身高为168cm

C．学生书桌高约为200mm

D．人正常步行速度约为5m/s