一、单项选择（每小题 1 分, 共 10 分）
( ) 21. --- New kinds of morning exercise like doing dancing are becoming popular.
--- can help us keep fit and have fun.
A. We B. You C. They
( ) 22. You can’t decide whether or not you like something until you try it,
it’s important to try something new.
A. but B. or C. so
( ) 23. Parents should let children home and find more about the world.
After all, birds should fly freely in the sky.
A. leave B. enter C. reach
( ) 24. When we read a piece of news online, we’d better mare it’s
before sending it to others. If not, we may spread something bad.
A. true B. special C. strange
( ) 25. To r city beautiful, the are always very busy in the streets.We shouldn’t throw rubbish everywhere.
A. policemen B. cleaners C. drivers ( ) 26. --- Our motherland’s 70th birthday is coming.
--- Great! We will hold many activities to celebrate it .
A. wisely B. warmly C. simply
( ) 27. Fighting for your dream is like climbing a mountain. Whatever diffic