In the past twenty years, a huge amount of environmental damage has been caused(cause) by air pollution. 相关知识点: 试题来源: 解析 答案:has been caused.根据题意,本题考查动词的时态。根据句意和in the past twenty years可知,故用现在完成时态;再者damage和cause之间属于被动关系,故填has been ...
解析 C 本题考查现在完成时态和主谓一致。题目中“In the past twenty years”提示使用现在完成时态,而主语“an increasing tendency”为单数,因此谓语动词也应为单数形式。选项C“has been”符合要求,为现在完成时态的单数形式。其他选项均不符合要求。因此,正确答案为C。反馈 收藏 ...
in the past twenty years（在过去的二十年里）in the past +数词+years/ months/ weeks等时间名词，意思是在过去的若干时间里（从过去到现在或从现在到过去），用于现在完成时态。例句：1、In the past twenty years they have been dealing with quite a few international corporations successfully....
In the past twenty years great changes ___in China. A.were taken placeB.have been taken place C.have taken placeD.were happened 试题答案 在线课程 C 考查固定短语的用法。句意“在过去的二十年里,中国发生了巨大的变化。”take place“发生”,不用于被动语态,排除A、B;happen“(偶然)发生”,不用于...
10．However, new educational trends have turned up in the humanities and social sciences in the past twenty years．（华人2004年教育英语模拟试卷（二））11．A price index makes it possible to compare the present prices of some consumer goods, for example, with prices of the same ...
In the past twenty years, a huge amount of environmental damage by air pollution.A. has been caused B. have been caused C. was caused D. were caused 相关知识点: 试题来源: 解析 [答案]A [解析] [详解]考查时态和主谓一致。句意:在过去的二十年里,空气污染已经对环境造成了很大 的危害。“...
【解析】has been caused【解题思路】考查时态、语态和主谓一致。句意在过去的二十年里,空气污染已经造成了巨大的环境破坏。由时间状语 In the past twenty years 可知,应用现在完成时;主语 a hugeamount of environmental damage和 cause之间是被动关系,所以要用被动语态;"a huge amount of +不可数名词"作主语时...
In the past twenty years, riding bicycles has become more and more popular among people of all ages. (1)Bicycles have long played an important part in the lives of American young people.But today an even greater number of adults cycle along roadsides and bicycle paths.These new riders are ...
In the past twenty years, there has been an increasing tendency for workers to move from one country to another. (1) some newly independent countries have understandably restricted most jobs to local people, others have attracted and welcomed migrant workers. This is particularly the case in ...