第二部分：词汇知识运用（共二节，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 difficulties they are facing are just beyond though they are determined to continue their research.
A. way B. belief C. thing D. matter
24. Tom opened a bookstore in NO.3 Middle School, but it closed down.
A. ever since B. just then C. before long D. soon after
25. When the thief found the police had already him ,he ran away quickly.
