用所给词的适当形式填空。 1. Mr. Li _____ (make) maths so easy when he was a teacher. 2. The supermarket is too _____ (crowd), and I don't enjoy it. 3. Does your sister enjoy _____ (do) homework with you? 4. The Greens _____ (go)to South Africa to watch soccer games last year. 5. The relaxing music made the patient(病人) _____ (feel) better.