单项选择题
How will the government know what the air quality is（）
A. The factories will test the air every day. B. Scientists will test it every day. C. A report will be published. D. They will ask homeowners.
单项选择题 The High Street is so narrow that the local government has decided to（）it.
单项选择题 If I knew more English, I（）for this position.
单项选择题 The teacher had the monitor （） the papers.
