The city has improved a lot _________ I came here a few years ago. A. since B. for C. when
Taking ______ exercise and eating ______ food can make you keep thin.
If you hard, you a good grade in the exam.
—What do you think of the talk show? — . I watch it every week.
Two percent of workers in this factory men. A large number of them women.
— What do you think of math? — I find difficult to learn it.