How close parents are to their children ________ a strong influence on the development of the children's characters.
The nurse doesn't feel well today, _________ she still works very hard.
Tom has been in the factory _________he left school.
He had _________ much work to do that he couldn't go out.
________the new computer, travellers at the offices of CAAC can now buy their air tickets much faster.
Before 1992, there was no airline _________ the two cities.