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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. There is always a pleasant _______ of calm at night in the small mountainous village, different from the noise in the city.
A. atmosphere B. environment C. observation D. consideration
22. With a kind of delight, based on fattened hope resting on the pills, she unpacked the package and read the ________.
A. introductions B. constructions C. descriptions D. directions
23. As teachers, we should _______ our students boldly to anything complicated and profound to enhance their curiosity about the world.
A. devote B. apply C. contribute D. expose