You are old enough to your own living. (2011 .辽宁)
Heilongjiang Province is _____ north of Liaoning. Harbin, its capital city, lies _____ the Songhuajiang River.
I don't remember___________ to the airport that year.
A man does not know the difficulty of anything_________ he does it personally.
There is a _________ of 1000 dollars for the return
Isn't it very kind __________ your parents to do that for us? A. for B to C. about D. of