---Are you free after school? ---Sorry, I’ve planned to treat a friend of mine to dinner___for his help.
He smiled politely ________ Mary apologized for her drunken friends.(2012·山东)
________ we have enough evidence,we can't win the case.
He is so busy.He cannot afford enough time with his son________he wants to.
I have heard a lot of good things about you ________ I came back from abroad.
________I have to give a speech,I get extremely nervous before I start.