May we leave the classroom now — NO, you . You to leave until the bell rings.

The latest survey by www99com found more than 12 percent of teenagers want to work aspilots [ ]

________ of personal taste

_______ the extreme levels of air pollution, city authorities have started to take measures to quickly reduce pollution levels and protect city dwellers.

Was there much ______ in Nanjing last week—- Yes, it snowed a lot.