I _____ a math problem with Joe when Mike called me up.( )
have discussed
discussed
was discussing
—You_________ be happy with the strong public support you’ve received.—Yes, you’re right. I’m really excited.
()—Sandy, we need an actor for the action movie. __________ you play kungfu?—Sorry, I can’t.
---Who is making much noise?---It ____ be Timmy. He is sleeping now.
-- Must I write down all the new words now? No, you_______
—Peter doesn’t mind lending you his camera.—He _______. I’ve already borrowed one.