题目内容
3. 对我们来说离开时关灯是很有必要的。
3. It's necessary for us to turn off the lights when we leave.
8. 我们可以通过骑车来减少空气污染。
3. 我们应该尽力让它一直保持那样。
7. They (discuss) when to have a class trip. Let's wait a minute.
3. (2013乌鲁木齐) 中国最年轻的城市三沙市建立于2012年6月21日。
Sansha,the youngest city of China, up on June 21st,2012.
() 4. We should try to all our waste paper.
A. recycle B. protect C. produce D. reduce
6. — How can we reduce air pollution?
—By (ride) bicycles.
6. My mom would never (允许) me to travel alone in the past.
二、单项填空
() 1. Jim clean up the classroom this morning.
A. was seen to B. seen C. saw to D. saw
