你必须努力工作,不然你就不能赶上别人.
她既不能写这门语言也不能说这门语言.
女孩喜欢洋娃娃就像男孩喜欢玩具枪一样.
He lives in a building,which is about 30 meters high.
Do you know the man who came to see her this moring
I don not think you are right.
Is there anything you need?
The books which you lent me are not very interesting.
I haven't seen Jane last January.