第二部分：英语知识运用(共两节。满分55分)
第一节：语法和词汇知识(共15小题；每小题1分，满分15分)
从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。
21. — Would you mind my coming over and having a look at your new garden? My little son’s curious about those roses you grow.
—________. You are welcome.
A. Yes, I do B. Never mind C. Yes, please D. Not at all
22. Some people are worrying about the possibility ________ cellphones could be responsible for a range of illnesses, from rashes to brain tumors.
A. that B. why C. how D. whether
