答案:答案:众所周知,锻炼有益于健康。
答案:答案:众所周知,锻炼有益于健康。
A. am
B. is
C. are
D. be
A. needn't to come
B. don't need come
C. don't need coming
D. needn't come
A. Ten o'clock.
B. Ten yuan a kilo.
C. I like it very much.
D. I don't like.
A. I 'm a teacher.
B. I play football.
C. You are a student.
D. They clean rooms.