第17题: [单项选择]Tom was on his way to meet his father, whom he ______ for many years. A. has not seen B. not saw C. had not seen D. did not see 参考答案:C 答案解析:本题测试的是时态一致。全句的意思是：“汤姆正在去看他父亲的路上，他们好多年没有见了。”此句的主句是过去时态，根据时态一致原则，非限定性定语从句中也应用过去时态。又因为从句中for many years
第27题: [单项选择]下述哪项特点对诊断细菌性角膜炎最有意义（） A. 连续佩戴角膜接触镜1周后发生角膜炎 B. 感冒发热、疲劳后发生角膜炎 C. 角膜溃疡的程度非常重，尽管患者的症状并不严重 D. 出现明显的前房积脓等虹膜睫状体炎表现 E. 出现大量的黏液脓性分泌物 参考答案:E 答案解析:该题测试考生掌握细菌性角膜炎鉴别诊断能力。A可以是细菌，也可以是真菌或棘阿米巴等角膜炎，B更符合单孢病毒性角膜炎，C是真菌性角膜炎的特点，D在任何严重的角膜炎均可出现。A～D均为干扰答案。而大量黏液脓
A. were Dutch settlers B. Dutch settlers had been there C. Dutch settlers were there D. had been Dutch settlers 参考答案:D 答案解析:倒装句。among引导的介词短语放在句首，引起句子倒装，所以排除选项[B]和[C]，而根据后面who later prospered的时态为一般过去时，则此前发生的一定为过去完成时，所以排除选项 [A
