221. Professor Jordon is well known for his _____ into the habits of the common housefly.

　 A. examination　　 B. introduction

　 C. research　　　 D. expression

[答案]C. research

[注釋]research into對(duì)...研究：1)(作動(dòng)詞用)He is researching into the reading problems of young school children.2)(作名詞用)to carry out a research(=some research)into the causes of brain damage.(對(duì)大腦損傷原因進(jìn)行研究)。

研究可譯為make researches into, make a study of 或直接用動(dòng)詞study vt或research into (a problem etc.).

220. I support your decision, but I should also make it clear that I am not going to be _____ to it.

A. connected　　 B. fastened　　 C. bound　　 D. stuck

[答案]C. bound

[注釋]be bound to sth.受...的約束：I was bound to my promise.(我受我的諾言約束)[注意]be bound to do sth.1)一定會(huì)：The plan is bound to win.(這項(xiàng)計(jì)劃一定會(huì)成功。)2)有責(zé)任(義務(wù))：You are bound to obey the laws.(你有責(zé)任遵守法紀(jì))。

本題譯文：我支持你的決定，但是我得說(shuō)明，我不打算受它約束。

219. John _____ knowledge of radio just by staying around the radio station.

A. caught on　 B. worked up　 C. took up　 D. picked up

[答案]D. picked up

[注釋]pick up學(xué)到，習(xí)得。詳見Ⅲ。130注釋。

218. In spite of the thunderstorm, the children slept _____ all night.

A. densely　　 B. soundly　　 C. loudly　　 D. noisily

[答案]B. soundly

[注釋]sleep soundly熟睡。也可以說(shuō)sleep heavily.

217. They did not find _____ to prepare for the worst conditions they might meet.

　 A. worth their while　　 B. it worthwhile

　 C. it worth　　　　　　 D. it worthy

[答案]B. it worthwhile

[注釋]worthwhile值花時(shí)間(或精力)干的：1)The visit to Paris was worthwhile .2)He thinks teaching foreign languages is worthwhile.3)She has a very worthwhile job.4)I think it worthwhile to work on my stamp collection.

Worthy (of)配得上，值得：1)He is worthy of being praised.(=He is worthy to be praised.)2)He is a worthy winner.3)She is not worthy to talk to man like you.(她配不上與你這樣一位男士談話)。

216. The microphone enabled them to keep in touch, in other words, it made it _____ for them to contact each other.

A. likely　　 B. capable　　 C. possible　　 D. probable

[答案]C. possible

[注釋]able有才能的，有能力的，指人的才智，而且是受過(guò)實(shí)際鍛煉的才干。Capable“有才能的，能勝任的”(有褒、貶 二義)，如：He is capable of anything.(他什么事都干得出來(lái)。)此句含有明顯得貶義。此外，作表語(yǔ)時(shí)，able接不定式，capable接of. capable還有一意思是“有可能 的”，例如：The car is capable of being repaired .(這輛汽車是有可能修好的。)用于此義時(shí)，be capable of 后常接被動(dòng)語(yǔ)態(tài)動(dòng)名詞或有動(dòng)作意義的名詞：The situation is capable of improvement .possible 強(qiáng)調(diào)客觀可能性，“可能的”程度比probable"大概的，很可能的低一些。

[注意]likely與possible在結(jié)構(gòu)搭配上的區(qū)別。Likely可用于下列句型中：1)It is likely that...例如：It is highly likely that he will succeed.(很可能他會(huì)成功。)2)think(feel, consider)it likely ...例如：I think it likely that we will ultimately get a certain amount of money.3)be likely to do sth.例如：He is likely to see you again .但下面的句型是錯(cuò)誤的，It is likely for sb to do sth.所以think it likely for sb. to do sth.也是錯(cuò)誤的，故本題不能選likely.

215. She is making herself ill with _____ over her son's future.

A. trouble　　 B. annoyance　　 C. disgust　　 D. worry

[答案]D. worry

[注釋]worry既可作動(dòng)詞用，也可以作名詞用，意思是“憂慮”，后接介詞about或over。worry over 比worry about對(duì)某事的憂慮更為持久，更為專注，如：He worries over the least thing that goes wrong.(他總是惟恐有一點(diǎn)小事出錯(cuò)。)

214. When products made in factories _____, they are thrown away as garbage.

　 A. come to an end　　 B. are put to use

　 C. are used up　　　 D. wear out

[答案]D. wear out.

[注釋]wear out本題中意指(become useless form continued use of wear)用壞，穿破，如：The machine will soon wear out.(這機(jī)器即將用壞。)come to and end(結(jié)束)，put ... to use(投入使用), use up(用完)， come into use(開始投入使用)。

213. I _____ her not to walk on the thin ice but she would not listen to me.

A. warned　　 B. persuaded　　 C. suggested　　 D. noticed

[答案]A. warned.

[注釋]warn sb. (not) to do sth.警告某人(不)做某事。

Suggest不能接sb. to do sth。persuade sb.(not) to do sth.說(shuō)服、某人(不)做某事；本題中不能選D. persuaded, 因該動(dòng)詞強(qiáng)調(diào)行為的結(jié)果。從邏輯上講，既然“說(shuō)服了”，那么與she wouldn't listen to me就前后矛盾了。如果把句子該為：I tried to persuade her not to walk on the thin ice but she wouldn't listen to me.(我極力勸她不要在薄冰上走，但她不愿聽我的話。)，那么就符合邏輯了。

[注意]warn sb. of sth.警告某人有......。

212. It was clear that the small grocer was _____ people he owed money to.

　 A. at the expense of　　 B. at the risk of

　 C. in the way of　　　　 D. at the mercy of

[答案]D. at the mercy of.

[注釋]at the mercy of在......支配下：The ship was at the mercy of the waves.(這艘船任憑風(fēng)浪擺布。)

at the expense of以......為代價(jià)，靠犧牲......；in the way of礙......事；at the risk of冒......的危險(xiǎn)：1)He devoted his time to football at the expense of his studies.(他犧牲學(xué)習(xí)把時(shí)間都花在足球上。) 2)Her social lift got in the way of her studies.(她的社交生活妨礙了她的學(xué)習(xí)。) 3)We do this at the risk of our lives and liberties.(我們冒丟掉生命和喪失自由的危險(xiǎn)做這件事。)

本題譯文：顯然，這家小雜鋪任憑其債主的擺布。