This is ________ article written in English. I think English is ______ useful language.
If it rain tomorrow,we’ll go on a trip.
Some volunteers(志愿者) from Beijing arrived in Shanghai April 29 to work for the World Expo.
--Did you see a girl in red pass by just now?--No, sir. I _______________a newspaper.
---- Do you know how to prevent (预防) the H7N9 flu?---- You can ask the doctor for some ________.
He was riding to school it began to rain.