When it______air pollution, Beijing faces the three “C” s—–cars，coal and construction，which lead to Beijing’s thick air pollution.

Who is the girl in pink— ________ is our new classmate who often helps ________ with our English.

hey retire, many peopleover 60 prefer the houses in the country to spend their remaining years to__________ in a large city.

He is no fool at all;_________，he is the smartest boy I have ever seen.

If you are late again,you’ll be________ from your job. [ ]