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. I’m writing to apologize for my absence from last week’s meeting. I was unexpectedly _____ at work.
A. picked up B. made up C. given up D. held up
22. She wore a(n) _______ look when she told me she could have helped do that for me.
A. urgent B. embarrassed C. nervous D. guilty
