Mr. Wang is ill, so we must ____ a new teacher to the school to take his place.
__________ 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.
__________there are only 20 minutes left before the train left,I felt uneasy in the taxi to the railway station.