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第一部分：词汇选项 下面共有15个句子，每个句子中均有1个词或短语划有底横线，请从每个句子后面所给的4个选项中选择1个与划线部分意义最相近的词或短语。答案一律涂在答题卡相应的位置上。 1 The cheetah is considered the fastest of all land animals. A regarded as B substituted for C compelled to be D expected to be 2 Writing is a skill that requires consistent practice. A invariable B orderly C regular D customary 3 Some birds consistently return to the same nesting area each spring. A occasionally B purposely C regularly D surprisingly 4 Cold air causes the arteries around the heart to constrict. A become rigid B contract C close D die 5 Crayfish, small freshwater crustacean similar to lobsters, are consumed by inhabitants of the Mississippi River Basin. A bred B caught C eaten D supplied 6 Groundwater, a resource that exists everywhere beneath the Earths surface, is under increasing risk from contamination and overuse. A popularization B contraction C pollution D industrialization 7 The ability to contemplate two contradictory thoughts at once is said to be a mark of genius. A hypothetical B profound C opposing D mathematical | 
