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，每小题一分，满分15分）
从Ａ，Ｂ，Ｃ，Ｄ四个选项中，选出可以填入空白处的中的最佳选项。
21. People who are addicted______ drugs can not go without them for a few hours.
A. in B. for C. of D. to
22. Hawking wrote about his work in a way that ordinary people could _____ his theory.
A. connect to B. relate to C. think about D. compare to
