一、单项填空。(每小题 1 分,共 20 分)
( ) 1. Millie practises playing the piano for an hour every day. She is _______.
A. lazy B. generous C. hard-working D. silly
( ) 2. We promise you success, you can get your money back.
A. but B. so C. or D. then
( ) 3. I would rather at home than out on a rainy day.
A. stay; go B. staying; going C. to stay; go D. stay; going