用所给词的适当形式填空
1. He usually ________ (read) a newspaper after supper.
2. The woman ________ (finish) cleaning the house just now.
3. What ________ they ________ (do) at this time yesterday?
4. Do you find it easy ________ (ride) a bike.
5. I ________ (fly) a kite when it began to rain.