单项选择题
A．Jim’s notes are not very good. B．Professor Harrison doesn’t teach well. C．Mary should have come to the lecture earlier. D．Mary doesn’t have to borrow notes from Jim.
A．She is a high school student. B．She is an opera singer. C．She is a college student. D．She is a pop singer.
A．Doing regular checkups to prevent illness that threatens our longevity. B．Doing crosswords puzzles. C．Doing everything in the list. D．Doing gardening everyday.