The overseas Chinese scientist made another wonderful discovery, ___________ of great value to study AIDS.

_______ he said in the wedding ceremony moved everyone present. 

— May I go and play football with Dick this afternoon, Dad?— No, you can’t go out ________ your work is being done. 

He wrote his first novel ______ studying in a university.

It was a small room, ________ it afforded a fine view of the old city.