I often watch them ___ the piano .
—The twins are quite different. Sam is wild while Tom is quiet.—Yeah, Sam is ___________ than Tom.
—What is the most important for us to learn well as students?—I think your teacher should ________ carefully in class?
—Jim, could you tell me if you _____________ our party tomorrow?—I think I will if I _____________ free.
—You __________ in the south of China, didn’t you?—Yes, but now I like living here though it’s cold all the year around.
—I can’t always understand when people talk to me in English.—Why not __________English more after class?