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. One of the many ____leading to widespread unemployment is the depression of economy. 学
A. reasons B. causes C. factors D. goals
22. As a teacher, he should also know to develope the ____intelligence and abilities of a student.