Anyone, once ____ positive for H7N9 flu virus, will receive free medical treatment from our government.
If has been raining days.
If I had worked harder at school, I in a comfortable office now.
twice a year, whether it is a car or a bus or a truck, is the rule that every driver must obey in this city.
, he wanted to buy his son a cheap toy for his birthday.
They considered a computer, which was considereda great help in their work.