第二部分：英语知识运用（共两节，满分45分）
第一节：单项填空（共15小题；每小题1分，满分15分）
21. There are some health problems that, when ____ in time, can become bigger ones later on.
A. not treated B. not being treated
C. not to be treated D. not having been treated
22.___________in the mountain for a week, the students were finally saved by the local police .
A. Having lost B. Lost C. Being lost D. Losing
23. ---Have the arrangements for the concert next Saturday been all _______?
---Not yet. We haven’t found a free hand.
A. in store B. in trouble C. in turn D. in place
24.---Have you got any particular plans for the coming holiday?
---Yes. __________, I’m going to visit some homes for the old in the city.
