To find out _______ young people think about the future of urban life, a teacher in the US. asked his students to think ______ they would run a city of 50,000 people in 2025.

A．what; how

B．how; what

C．what; what

D．how; how

将下列句子译成英语。

1. 老师要求我们不要弄出那么多声音。(make much noise)

    _________________________________________________________

2. 妈妈告诉我在学校要听从老师的吩咐。(follow sb.'s instructions) 

    _________________________________________________________

3. 要求来访者勿踏草地。( request) 

    _________________________________________________________

4. 不止一所学校正在使用这套教材。(more than one, this set of) 

    _________________________________________________________