第一节：单项选择（共15 小题；每小题1分，满分15分）
请认真阅读下面各题，从题中所给的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. In 1778, Joseph Banks was elected ____ president of the Royal society, _____ position he held for 42 years.
A. the; the B. a; a C. /; a D. a; /
22. Millions of Shanghai citizens are learning to ____ English for the 2010 World Expo.
A. tell B. speak C. talk D. say
