1.We saw a lot of commercial buildings in Chicago.
A condemned B razed C business D vacant
2.Salt has been a respected commodityfor much of recorded time.
A flavoring B preservative C remedy for illnes D article of trade
3.Pure feldspar is a colorless, transparent mineral, but impurities commonly make it opaque and colorful.
A truly B rapidly C periodically D frequently
4.In 1925 Clarence Darrow competently opposed William Jennings Bryan at the renowned Scopes’ “Monkey Trial”.
A adeptly B maliciously C privately D rashly
5.The Olympic Games attempt to transcend national interests and bring together the best international athletes in a spirit of friendly competition and peace.
A debate B celebration C instruction D rivalry
答案：1.C commercial adj. 商业的, 贸易的 (business, mercantile)/homespun adj. 朴素的 (simple)/vacant adj. 未被占用的 (empty, uninhabited)/razed adj. 被夷为平地的 (leveled)
2.D commodity n. 商品;日用品 (article of trade, goods)/remedy n. 补救;治疗法 (treatment, redress)/preservative n. 防腐剂/flavoring n. 调味品, 调料 (seasoning)
3.D commonly adv. 通常地 (frequently, usually)/transparent adj. 透明的 (seethrough)/feldspar n. 【矿】长石 (crystalline mineral rock)/opaque adj. 不透明的 (nontransparent)/periodically adv. 定期地 (intermittently)
4.A competently adv. 充分地 (adeptly, sufficiently)/adeptly adv. 熟练地 (efficiently, skillfully)/maliciously adv. 不怀好意地 (malevolently, wickedly)/rashly adv. 轻率地 (brashly, incautiously)
5.D competition n. 竞争 (rivalry, contention)/athlete n. 运动员 (sportsman)/rivalry. 竞争(competition); 敌对状态