We don’t doubt _____ he can do a good job.　　

 I don't believe we've met before,      I must say you do look familiar.

____ he has made up his mind to do something, nothing will stop him.

_______ he lives in a rich family, he started from the lowest position as an ordinary worker to make his living.

_____ the government recovers the vehicle purchase tax and the oil prices go up continuously, the sales of the vehicle in China are still increasing every year.