We should try to prevent air pollution__________.

_________are my parents. _________ work in an office

It’s already 10 years since we parted from school.Shall we have a get-together this month— ________.

It is reported that the scientists in our country are _____ all possible ways to control H1N1 flu. [ ]

How far is Yuhua Middle School from here——It’s around five minutes’walk.