Though Professor Liu ____ in New York for seven years, he has never regretted moving back to Shanghai, his hometown.
58. Sometimes, the entrance tickets are _______ free of charge from the university.
57. I have never dreamed of _______ such a good hotel in this town.
56. _______ for our teachers, we’d never have been able to enter this university.
15. Some of the doctors are paid almost ______ as the nurses.
14. ______ I’m well again, I can go on with my work.