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. The speech from the new government is a _______ that major changes are on the way.
A. warning B. symbol C. goal D. signal
22. One hundred percent _______ to your studies, though it can be lonely and no fun at all, will leave precious marks on your youth.
A. commitment B. attention C. reference D. reaction
23. The discovery of the oil field, to the delight of the whole nation, will largely _______ the country’s dependence on imports of energy.
A. adjust B. affect C. settle D. ease
24. Landing safely in bad weather is a _______ task for any pilot, and even the smallest error can lead to a
