第二节语法与词汇知识（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。
6. We have every reason to believe that ______ 2010 World Expo in Shanghai will be ______success.
A. the; a B. the; / C. /; a D. a; a
7. —Where is that report?
—I brought it to you _______ you were in Mr. Black’s office yesterday.
A. if B. because C. when D. before
