II.语言知识及应用(共两节,满分35分)第一节 单项选择(共20小题;每小题1分,满分20分)21. Will you _____ the clock? It’s slow.
How can you expect to get anything____ you never give?
There are many kinds of birds in Australia,and over 140 species of snakes,many of ____are extremely dangerous.
Private cars are required to take turns off roads one out of five weekdays ____the traffic pressure.
There is a saying ____swimming is a good way to keep fit.
This is a city which lives for today while ____ by its past.