第二部分:词汇知识运用(共两节，满分45分)
第一节：单选（共15小题；每小题1分，满分15分）
21.--You have made the same mistake.
--____ It’s none of your business.
A. Never mind. B. So what? C. No problem. D. Why not?
22. -- The lion is considered to be the king of the forest as it is a(n) __ of courage and power.
-- Oh, I see.
A. symbol B. signal C. mark D. sign
23. Private cars really provide much convenience to people, and __ they cause too many problems.
A. therefore B. meanwhile C. otherwise D. instead
24. -- The doctor’s discovery has had __ profound effect on mankind.
-- So it has. It has made __ great difference to our life span.
A. the; a B. the; the C. a; a D. a; the
25. The mobile phone was __ for at the least five years, but it was wrong only one year later.
A. ensured B. guaranteed C. protected D. promised
26. When we __ on our life journey after graduation from university, we are confident about our future.
