It is estimated that the price of a personal computer ______ by an average of 25% a year since 1990.A.fell B.had fallenC.is falling D.has fallen选哪个,为什么?

It is said/thought/known/reported/estimated/believed/ (that)是什么意思It is said/thought/known/reported/estimated/believed/ (that) 是什么意思最好在造个句子 “It is estimated that the figure will conting to go up in the future ”的中文翻译 翻译It is estimated that over one million Americans now live below the poverty line. It is estimated that 10% of electriaity used in Chain will be generat It is estimated that more than 60 percent of Toronto's population trace their roots It is estimated that more than 60 percent of Toronto's population trace their roots to countries other than Britain It is less likely that an earthquake will happen in Chongqing,according to a report __________ the urban quake risks of 30 major cities .A.estimated B.to estimate C.being estimated D.estimating It is estimated that much of a teenager's time is spent______ with friendsA. to talk B. talking C. being talked D. having talked It is estimated that every two-and-a-half minutes a child is treated in an emergency room for a playground-related injury.怎么翻译这句话吖 It is estimated that by 2010 50% of the world's population will be living in cities.为什么是will be living in而不是will live in it is estimated that more than 50 million people have been infected with this disease already.=More than 50 million people are_____________________ It is estimated that those enterprises will suffer losses of up to100 million yuan this year due toasharp decline in_ A,supply B,strategy C,demand D,cost 英语达人进来帮小弟翻译下这个The number of speakers of English in Shakespeare’s time is estimated to have been about five million. Today it is estimated that some 260 million people speak it as a native language, mainly in the United S 英语翻译The basic structure of a log earnings equation,no matter what dataset was used and what country it is estimated for,has a similar structure.It turns out that there are patterns in the well-being data. It is estimated that the price of a personal computer ______ by an average of 25% a year since 1990.A.fell B.had fallenC.is falling D.has fallen选哪个,为什么? 一到英语语法题It is estimated that the novel will be _____ of his best sellers,for his novels are quite popular among young people.A.another B.either C.other D.the other 英语翻译People with disabilities take up a large part of the population.It is estimated that over 35 million Americans have physical,mental,or other disabilities.About half of these disabilities are “developmental”,i.e.,they occur before the 英语翻译求翻译和语法,（语法尽量详细） It is estimated that the average man or woman needs between seven-and-a-half and eight hours' sleep a night. it is estimated that by the end of the month 100 people ____A had been killed B would have been killedmonth是指上个月还是这个月如果是指这个月底 不是应该用B 为什么答案选择A