第一节语法和词汇知识（共15个小题；每小题1分，满分15分）
从A,B,C,D四个选项中，选出可以填人空白处的最佳选项，并在答题卡上将该项涂黑。
21. Hong Kong has a lot of advantages, including free flow of ____ information, a fair competitive environment and _____ efficient local government.
A. the, an B. \, the C. \, an D. the, the
22. The Science Museum, _____ we visited during a recent trip to Britain, is one of London’s tourists attractions.
A. which B. what C. that D. where
