第二部分：词汇知识运用（共两节，满分30分）
第一节：多项选择（共10小题；每小题1分，满分10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.While I admit that English words keep escaping from our memory, constant ______ to them not only increases our understanding of them, but likely plants them into our mind.
A. pressure B. exposure C. procedure D. mixture
【答案】B
【解析】 句意：尽管我承认英语单词总会从我们记忆中溜掉，而不断的接触他们不但会增加我们对他们的理解，而且也可能把他们植入我们脑中。A. pressure 压力；B. exposure暴露；C. procedure程序； D. mixture混合。根据句意选B。
22. To make contributions to the protection of the environment, the company encourages its workforce to make the _______ to alternative means of transportation such as carpooling or biking to reduce air pollution.
A. switch B. conclusion C. variety D. enquiry
【答案】A
【解析】 句意：为了对环境保护做出贡献，公司鼓励职工选择如拼车或者骑自行车等可替代的交通工具来减少对空气的污染。A. switch 改变，转变；B. conclusion 结论；C. variety变化； D. enquiry询问。选A。
23. Compared with the generation of our grandparents, who grew up in an age when people were _____ in almost every kind of materials, we should be content with the abundant supply.
