A. Yes, please B. I like coffee very much C. Yes, I prefer tea D. Thank you very much
单项选择题He gained his（）by printing（）of famous writers.
A. wealth; work B. wealths; works C. wealths; work D. wealth; works
单项选择题There are no lights on and no one answer the doorbell. They（）be at home.
A. must not B. will not C. should not D. can not
