398. [答案] A. undergo.

[注释]undergo (=experience esp. suffering or difficulty) 经受：1)She underwent a thorough examination at the hospital. (她在医院接受了全面的检查。)2)The travelers underwent many difficulties. (这些旅行者经受了许多困难。)undertake (=take up a [position]; start on [work]) 从事，负责(某事)：1)He undertook the responsibility for changes. (他负责对各种变化作出安排。)2)At first we could only undertake repair jobs. (起初我们只能干修理活。)3)We shall undertake the construction of this bridge. (我们将负责这座桥的修建工作。)transform 改变;suspend吊，悬挂;推迟，暂定。

　本题译文：由于暴露于空气、水和有机物，岩石经受了称之为风化的变化。

397. [答案] B. readily

[注释]readily (=with no difficulty)容易地;They can readily be bought anywhere. (这些 东西在任何地方都能容易地买到。) actually 实际上;fairly 公平地;相当，划算;primarily主要地，首先;根本上。

396. [答案] A. put in for.

[注释]put in for(=make an application or request) 提出申请或请求;May I put in for five days' leave?( 我可以请5天假吗?)get round to (doing sth. ) 找到时间作某事;ask after 询问，问候;hold on to 坚持(接to 加名词)。

395. [答案] C. in public.

[注释]in public 公开地，当众;in private 私下;in secret秘密地; in detail 详细地。

394. [答案] D. row.

[注释]a row of houses (desks, books etc. ) 一排房子(书桌、书等)，戏院的“一排座位”即为a row of seats. queue (乘车，购物的)队，队伍。Rank(军队队列中的)排、横列。train指“(行进中的)长列，队列”;a long train of visitors(一长列参观者)。

393. [答案] D. in particular.

[注释]in particular (=especially, particularly) 特别是：1) You should avoid eating fat meat, in particular pork. (你应该避免吃脂肪多的肉类，特别是猪肉。2)The speaker talked about sports in general and about football in particular. In general 是in particular 的反义结构，从上述例2)中可以看到。about all最重要的;after all毕竟。

392. [答案] B. get fed up.

[注释]get (be) fed up with (=having had too much of something; at the end of your patience; disgusted; bored; tired)讨厌;I have had enough of his complaints. I'm fed up. (=I have heard all of the complaints I can stand. ) fall in with 符合，与. . . . . . 一致。参阅III. 51注释。Keep company with 与. . . . . . 交往，结伴;catch up with 赶上。

391. [答案] B. talk back.

[注释]talk back 顶嘴;1)Don't talk back to me! (别对我顶嘴!)2)Mary talked back when her mother told her to stop watching television; she said, “I don't have to if I don't want to. ”give way 让路;look up查阅;get down从. . . . . . 下来;记下。

390. [答案] C. bringing.

[注释]bring up 教育，教养，抚养大;1)The child is badly brought up. 2) I was brought up to be honest. 参看III. 17注释。grow up 成长，长大;发展，形成;1)I grew up on a farm. (我在农庄长大。)2)The custom of going away for one's holiday has grown up during the last thirty years. (外出度假的风俗习惯是最近30年形成的。)rear培养，抚育;rear children.

　raise[美国英语]养大;Where was he raised? (他在哪里长大的?) raise还有“饲养”的含义。

　[注意]rear 和raise后不能接up,故本题不能选用rearing 或 raising.

389. [答案] B. installed.

[注释]install 安装;assemble(=put together) 装配;equip装备;repaire修理。