396.The sailor_____time to visit his family before the ship went to sea.
A.put in for B.got round to C.ask after D.hold on to
[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)。
397.Throughout most of their lives,humans_____learn and increase their mental capacity.
A.actually B.readily C.fairly D.primarily
[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。
398.Through exposure to air,water,and organic matter,rocks_____changes known as weathering.
A.undergo B.transform C.undertake D.suspend
[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。
399.She tried to_____out of the window to see the procession more clearly.
A.bend B.lean C.bow D.slope
[答案]B.lean.
[注释]lean vi.倚，靠；lean out of the window(倚着窗户探出身去)，lean against a tree(背倚靠着树)，lean back in a chair(坐在椅子上背向后倾)，lean on a desk(靠在桌上)，指胸对桌子。
400.The problem had become_____in his mind,and he could not decide what to do about it.
A.simplified B.exaggerated C.matured D.isolated
[答案]B.exaggerated.
[注释]exaggerate(=say or believe more than the truth about sth.)夸张，夸大：It was a rabbit,not a lion.You are exaggerating as usual.(这是一只兔子，不是狮子。你经常夸大事实。)
simplify简化；mature使成熟；isolate使孤立。
本题译文：这个问题在他头脑里夸大了，因此他无法决定该怎么办。
