241.Circus tigers,although they have been tamed,can_____attack their trainer.

　　A.unexpectedly B.deliberately

　　C.reluctantly D.subsequently

　　[答案]A.unexpectedly.

　　[注釋]unexpectedly出乎意料地。例如：He unexpectedly failed to get the job.(他出乎意料沒有得到這件工作。)又如：We met each other unexpectedly.(我們不期而遇。)deliberately故意地：I believe the house was deliberately set fire to.(我相信這房子是有人故意放火燒的。)reluctantly不情愿地，勉強(qiáng)地：She agreed,very reluctantly,to help.(她十分買鳥槍地同意幫忙。)subsequently后來，隨后：He escaped from prison but was subsequently recaptured.(他越獄逃跑了，但后來又被抓回來。)

　　本題譯文：馬戲團(tuán)地老虎雖然已被馴服，但也會(huì)出乎意料地襲擊馴獸師。

　　242.Stressful environments lead to unhealthy behaviors such as poor eating habits,which_____increase the risk of heart disease.

　　A.in turn B.in return C.by chance D.by turns

　　[答案]A.in turn。

　　[注釋]in turn(插入語)轉(zhuǎn)而，依次，而又：We need revision of estimated sales and this,in turn,will mean revision in production schedule.(我們必須修改預(yù)計(jì)銷量，而這反過來又意為這修訂生產(chǎn)計(jì)劃。)in return作為報(bào)答:I wish I could do something for you in return.(我要是能為你做點(diǎn)事作為報(bào)案就好了。)I gave him a present but he gave me nothing in return.(我送給他一份禮物，可他卻什么也不給我作為答謝。)by chance(=by accident)偶然地;無意中：I meet him by chance on Fifth Avenue.(我偶然在第5大街上遇到他。)by turns輪流地，依次：There were twelve of us in the boat and we rowed by turns.(船上有12人，我們輪流劃船。)

　　本題譯文：緊張的環(huán)境會(huì)導(dǎo)致諸如不良的飲食習(xí)慣等不健康行為，而后者又會(huì)增加患心臟病的危險(xiǎn)。

　　243.The patients believe that the doctor knows exactly how to put them_____.

　　A.correct B.perfect C.right D.well

　　[答案]C.right。

　　[注釋]put sth./sb.right糾正;治好，使恢復(fù)健康：Since man has done so much damage,it is up to man to put the matters right.(既然人類已造成了如此巨大的損害，人類又哲人糾正這種狀況。)又如：This medicine will soon put you right.(這藥很快會(huì)使你恢復(fù)健康。)其他3個(gè)選擇均不能與put構(gòu)成習(xí)語，故不能入選。

　　本題譯文：病人相信醫(yī)生清楚地知道怎樣治好他的病。

　　244.They decided to leave the waiter a big_____because the food and service had been excellent.

　　A.note B.reward C.tip D.gift

　　[答案]C.tip。

　　[注釋]tip本題中意為“小費(fèi)”。

　　245.And you find that you're not to be_____with a position of real responsibility.

　　A.offered B.trusted C.furnished D.retained

　　[答案]B.trusted。

　　[注釋]trust sb.with sth.把某事托付給某人：I can't trust him with my car.(我不能把我的車托付給他。)本題譯文：你認(rèn)為不會(huì)把真正有責(zé)任的工作托付給你。