_________ the math problem is difficult, I’ll try hard to work it out.A. When B. Though C. Before
---Did you like listening to music? ---Yes, I did. But now I’m more _____ sports.
--- I don’t think students should be allowed to do homework with friends. --- I ______ you, although they often talk with each other instead of studying,.
--- Would you like to play computer games with me? --- Sorry, I have ________ playing them.
-- Mary likes swimming. --- ______ .
--- I need something for cutting the paper. --- Oh, you want a knife? OK, I'll get ______ for you.