第25题: [单项选择]The book might well have ______ had it been less expensive. A. worked out B. gone through C. caught on D. fitted in 参考答案:C 答案解析:catch on变得流行；work out可以解决，计算出，想出；go through经历，经受；fit in适应，适合。只有C符合句意。
第28题: [单项选择]关于胸腔积液形成的病因，不正确的是 A. 胸膜淋巴引流障碍 B. 胸膜腔负压减少 C. 胸膜毛细血管内胶体渗透压降低 D. 胸膜毛细血管通透性增高 E. 胸膜毛细血管内静水压增高 参考答案:B
第29题:[单选题]He kept in contact with his family while he was in Australia. A.gradual
B.regular
C.direst
D.occasional 参考答案:B 题干意为“当他在澳大利亚的时候还与家人不断保持联系。”句中划线词意为不断的，持续的。B项regular意为有规律的，不变的；例句：We're going to be meeting there on a regular basis．我们将定期在那里见面。A项gradual意为渐进的，逐渐的；C项direst意为极度的；D项occasional意为偶尔的，不经常的；故选B.
