第二部分 英语知识运用(共两节，满分35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, 并在答题卡上将该项涂黑。
21. Everybody has ______ responsibility to save water, if future generations are to enjoy _____ imilar standard of living to the one we enjoy now.s
A. the; / B. a; a C. /; the D. a; the
22. Scientists say human activity contributes to climate change, but they do not agree on the rate
_______ climate change may be developing.
A. with which B. with that C. at which D. at that
23. Mary ______ all the housework, she dropped herself into the sofa, sighing with relief.
A. finished B. had finished C. having finished D. finishing
24. Each member country WTO must ___________ its laws and regulations and compete on the principle of
