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。
例：It is generally considered unwise to give a child he or she wants.
A. however B. whatever C. whichever D. whenever
答案是B。
21．Developing a low-carbon economy is global topic and the world needs
clean revolution with participation from everyone, decision makers to the children.
A. a；the B. a；a C. the；a D．／：the
