第二部分 英语知识运用 (共两节，满分35分）
第一节：单项选择 (共15小题；每小题1分，满分15分)
从A,B,C,D四个选项中，选出能填入空白处的最佳选项
21．He asked that none of us understood it.
A. such a difficult question B. so difficult question
C. such difficult a question D. so a difficult question
22. He is studying in America ,but he is not ,for he has made many good friends there.
A. lonely ; lonely B. along ; alone C. alone ; lonely D. lonely ; alone
