What rules you have to obey(服从)?
—How long have you________?—Since two years ago.
—Do you know whose car is it?—It belongs to_____. It isn’t ______.
The Chinese mainland has become the world's second______ market for iPhone.
Now China is fighting against illegal cooking oil(地沟油), a kind of waste oil _____can cause a lot of illness.
____9:16 p.m. ______September 29, 2011, Tiangong 1 was sent up into space successfully.