When it______ air pollution, Beijing faces the three “C” s-----cars,coal and construction,which lead to Beijing's thick air pollution.
-Sorry, I made a mistake again.
-Practice more and you'll succeed.
After studying in a medical college for five years, Janeher job as a doctor in the countryside.
The English spoken in the United States is only slightly different fromspoken in England.
The weather wascold that I didn’t like to leave my room.
—Have you got any idea for the summer vacation? —I don’t mind where we gothere’ sun, sea and beach.