1、科技英语第四阶段在线作业（自测）试卷(47148)1第 1 题 单选题 Please bear in mind that correct conduction of precautions can reduce or _ waterside corrosion to the minimum. A、export B、diminishC、embrace D、entrap标准答案：B2第 2 题 单选题 It was in 2005 _we began to introduce this new technique into our company.A、whichB、thenC、whenD、that
2、标准答案：D3第 3 题 单选题 When Bob and his friends came, we_our supper then.A、hadB、were havingC、haveD、are having标准答案：B4第 4 题 单选题 _ is she in London than she rings up her old friend Mary.A、 ScarcelyB、Rarely C、No sooner D、Hardly标准答案：C5第 5 题 单选题 If it_tomorrow, we will stay indoors to have our training class.A、
3、rainsB、rainedC、will rainD、is raining标准答案：A6第 6 题 单选题 He_the maths examination if he had worked hard enough, but he didnt.A、would passB、had passedC、would have passedD、passed标准答案：C7第 7 题 单选题 You must speak slowly, so that you can make yourself _.A、understood B、understand C、understanding D、to understan
4、d标准答案：A8第 8 题 单选题 There are two rooms in the house, _serves as a kitchen.A、the smaller of whichB、the smaller of thatC、the smallest of whichD、the smallest of that标准答案：A9第 9 题 单选题 I know Jonathan quite well and never doubt he can do a good job of it.A、while B、thatC、whenD、what标准答案：B10第 10 题 单选题 The met
5、hods used to achieve these aims will be described later, and _ can be seen broadly as a focusing on to a target.A、up to now B、so farC、as yetD、for the present标准答案：D11第 11 题 单选题 A marine shale, once believed to be a black mud rich in organic compounds, is a common source rock to _ oil.A、block B、discov
6、erC、originateD、prevent 标准答案：C12第 12 题 单选题 He left orders that nothing _ until the police arrived.A、was touched B、had been touchedC、should be touched D、was to be touched标准答案：C13第 13 题 单选题 They are trying to _ the waste discharged by the factory for profit.A、expose B、exhaustC、exhibit D、exploit标准答案：D14
7、第 14 题 单选题 For the time being, Philips could not say when such a product as this might be _ available, however.A、verticallyB、commercially C、horizontallyD、rapidly标准答案：B15第 15 题 单选题 By the time he arrives in Beijing, we _ here for two days.A、will stayB、have been staying C、will have stayed D、have staye
8、d标准答案：C16第 16 题 单选题 Every country tries to maintain a(n) _ balance of trade, which assures it of the means to buy necessary imports.A、 organic B、 favoriteC、compoundD、favorable标准答案：D17第 17 题 单选题 How many more decades will have to pass scientists succeed in providing a cure for cancer？A、whenB、beforeC、
9、sinceD、until标准答案：B18第 18 题 单选题 It is the business of the petroleum industry to find crude oil and gas and to _ them from the earth on-shore and off-shore. A、retrieve B、exchangeC、proceedD、change标准答案：A19第 19 题 单选题 Thank heavens! You have come back home. You should be thankful that you have escaped with only _ injuries.A、minor B、majorC、significantD、abundant标准答案：A20第 20 题 单选题 We must put the _ side of the policy into consideration to avoid possible mistakes.A、converse B、 reverseC、reserveD、revise标准答案：B
