During the National Games, I__________ much experience and knowledge through volunteer work.
There is no doubt that he is a good professor__________he is doing fine.
__________ there are a large number of chemical factories,the air is likely to be polluted.
_________,this kind of disease can do great harm to people there.
I’m willing to lend you a hand__________busy I’m for the moment.
—__________you like the car so much,why not drive it back? —Well,I can’t afford__________car.