补全对话。（共4小题，每小题1分；计4分）
Li Yang: Good morning. Mathew.
Mathew: Good morning, Li Yang. 1.
Li Yang: There's still smog (雾霾) today. We'll have to go to school with face masks(口罩).
Mathew: 2. According to the news, PM2.5 pollution is the main problem with air pollution.
Li Yang: Yes, and air pollution has done harm to people's health.
Mathew: So the Chinese government and Chinese people must take action to fight it.
Li Yang: 3.
Mathew: Yeah. Since PM2.5 is mainly caused by vehicles(机动车)and factories, cars with large
emissions(排放)should not be allowed and factories should be closely watched.
Li Yang: I agree. 4. And we suggest making the blue skies return for good.
Mathew: I hope so, too.
---Let’s visit the old people’s house.
---______ my mother asks me to do homework at home?
A. Why B. What if C. Why not D.How
---Have you finished your report yet?
---No, I'll finish it in _______ ten minutes.
A. another B. more C. other D. else
The advertisements________on the wall are designed by my sister.
A. are put up B. are putting up C. put up D. be put up
Teenagers should do what they can ________ their achievements.
A. to realize B. realize C. realized D. will realize
_______cool it is to take a photo with little Cindy! The lovely girl in the program called “Where’re we going, Dad!”
A. What B. What a C. How D. How a
