Everything _____ doing is worthy of _____ well.
To tell the truth, I would rather that I ____ the pain instead of you. You don’t know how worried I was.
____ of the land in that district ____ covered with trees and grass.
People have lots of problems living in the central Australian desert, ____ the lack of water is the most serious one.
--- Haven’t seen you for ages! Where have you been? --- I have seldom had any chance to come back to the hometown ____ I was sent to Beijing ____ the project.
Not only ____ strict with us, but also ____ for us.