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07-1 Unit 2 21.Although not an economist himself, Dr. smith has long been a severe critic of the governments ______ policies A economic B economical C economics D economy economy 经济 economic 经济的 economics 经济学 economical 节约的 frugal 节俭的 22. It is rather _______ that we still do not know how many species there are in the world today. A misleading B embarrassing C boring D demanding embarrassing 令人尴尬的 misleading 令人误解的 boring 郁闷的 demanding 耗时耗力的 considerable 大量的 23. The old building is in a good state of ______ except for the wooden floors A observation B preservation C conservation D compensation 词根serve 表示保留 reserve 储备;预定 reservation 预定 Reservation 专指印第安人居留地 conserve 保存，保护自然资源 preserve 保存以备后用 preservative 防腐剂 | 
