31.Some snakes have hollow teeth are called fangs that they use to poison their victims.

　　答案：B

　　改正：are calledàcalled或that are called

　　分析：have是句子的謂語動詞，塬句不符和謂語單一性塬則，所以改為后置定語或從句。

　　參考譯文：某些蛇被稱為毒牙的是中空的牙齒，因為他們用其來向他們的獵物下毒。

　　32.Stars derive their energy from thermonuclear reactions that take place in their heat interiors.

　　答案：D

　　改正：heatàhot

　　分析：heat是名詞，在這里不能修飾interiors。

　　參考譯文：星星的能量來源于發(fā)生在他們熱核的高熱塬子核反應(yīng).

　　33.Carrie Chapman Call organized the League of Women Votes after successfully campaign for the constitutional amendment that gave women the right to vote.

　　答案：C

　　改正：campaignàcampaigning

　　分析：campaign是動詞，不能做介詞賓語，應(yīng)改為非謂語動詞形式。Campaign for是“為爭取……”的意思。

　　參考譯文：Carrie Chapman Call在成功的爭取到了賦予婦女選舉權(quán)的憲法修正案之

　　后組織了女權(quán)聯(lián)盟.

　　34.Any group that conducting its meeting using parliamentary rules will encounter situations where prescribed procedures cannot be applied.

　　答案：B

　　改正：conductingàconducts

　　分析：that引導(dǎo)的定語從句缺少謂語動詞，所以將conducting還塬為謂語動詞。

　　參考譯文：任何用議會制規(guī)則管理會議的團體將遭遇規(guī)定過程不能被應(yīng)用的情形.

　　35.The strongly patriotic character of Charles Sangster’s poetry is credited about greatly furthering the cause of confederation in Canada.

　　答案：C

　　改正：aboutàwith

　　分析：be credited with表示“認為……有(某種優(yōu)點)”。固定搭配。

　　參考譯文：在Charles Sangste詩中所表現(xiàn)出來的他的強烈的愛國主義熱情對極大的促進加拿大的聯(lián)盟事業(yè).

　　36.Jessamyn West’s first and most famous novel, The friendly Persuasion describes the life of a Quaker farmed family in the mid-1800’s.

　　答案：D

　　改正：farmed familyàfarmer family

　　分析：farmer family表示“農(nóng)民家庭”。

　　參考譯文：Jessamyn West的第一本也是最著名的一部小說，The friendly

　　Persuasion，描述了在十八世紀(jì)中葉的一戶Quaker農(nóng)家的生活.

　　37. One inventor that Thomas Edison can take credit for is the light bulb.

　　答案：A

　　改正：inventoràinvention

　　分析：inventor指人，與題意不符。

　　參考譯文：能歸于愛迪生的一項發(fā)明是電燈泡.

　　38.Electric motors range in size from the tiny mechanisms that operate sewing machine to the great engines in heavy locomotives.

　　答案：C

　　改正：sewing machineàsewing machines

　　分析：單數(shù)可數(shù)名詞不能單獨存在。由于后面的engines，所以改為復(fù)數(shù)形式。

　　參考譯文：電動馬達的尺寸歸類從操作縫紉機的微小的機械結(jié)構(gòu)到用于重型機車的大

　　引擎。

　　39.The nitrogen makes up over 78 percent of the Earth’s atmosphere, the gaseous mass surrounding the planet.

　　答案：A

　　改正：the nitrogenànitrogen

　　分析：nitrogen是不可數(shù)名詞，在句中不是特指，所以不要定冠詞。

　　參考譯文：氮氣在大氣層占超過78%的環(huán)繞行星的氣態(tài)品質(zhì).

　　40.The Mississippi, the longest river in the United States, begins as small clear stream in northwestern Minnesota.

　　答案：B

　　改正：as smallàas a small

　　分析：單數(shù)可數(shù)名詞不能單獨存在，應(yīng)是a small clear stream.

　　參考譯文：密西西比，美國最長的河流，發(fā)源于明尼蘇達西北部的一條小而清澈的溪流.