第二部分：英语知识运用（共两节，满分45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，并填涂到答题卡上。
21. In _____ case where somebody is bleeding heavily，_______ good knowledge of first aid can make _____ real difference.
A. the; /; a B. a; /; the C. a; a; the D. a; a; a
22. ---Would you like me to help with your designing project?
---Not for the moment. I’ll ask you for help __________.
A. if possible B. if necessary C. if so D. if ever
23. _______ the Thai salesman saw the man, he knew that he was Mr. Li Keqiang, premier of the People’s Republic of China.
A. Since B. Meanwhile C. Every time D. The instant
24. The victim’s parents demanded that they ________ how the investigation on the
A. were informed about B. are informing about
C. be informed of D. should keep inform of
25. ---If _____ in a dilemma _______ you must decide whether to help the injured old man in the street, what
