ace as the locus generated when a A line straight ora curve moves through space ina prescribed manner. BCD 答案: B 测试点:词序. 分析: 单个形容词修饰名词时,一般放在名词前面.应为 straight line 。解题要点: 单个形容词作定语, 应置于名词前面. 而在 TOEFL 考题中这个词序常常被颠倒. 应留心划线的名词+ 形容词的错误形式. 38. A significant proportions of the plants and animals of Hawaii exists nowhere else in the ABC World D 答案: A 测试点;数的一致。分析: 冠词 A 后接单数名词,不能用复数的 proportions 。应去掉 s。 39. Mass advertising is employed when person – to– person selling is impractical, AB impossible, or simply inefficiency. CD 答案: D 测试点;词性/并列结构. 分析: or 所连接的部分应同词性、同形式.此处名词 inefficiency 应为形容词 inefficient, 与 impractical 和 impossible 并列. 40. Mexican jumping beans are actually seeds in which contain moth larvae whose activity ABCD causes the seeds to "jump." 答案: C 测试点:主语. 分析: 此处定语从句中的连接代词 which 兼作从句主语,前面不用介词.
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