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：馬戲團地老虎雖然已被馴服，但也會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.(我們必須修改預計銷量，而這反過來又意為這修訂生產(chǎn)計劃。)in return作為報答:I wish I could do something for you in return.(我要是能為你做點事作為報案就好了。)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)境會導致諸如不良的飲食習慣等不健康行為，而后者又會增加患心臟病的危險。

　　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.(這藥很快會使你恢復健康。)其他3個選擇均不能與put構成習語，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”。

　　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：你認為不會把真正有責任的工作托付給你。