Aids is said_____ the biggest health challenge to both men and women over the past few years.A.that it is B.to be C.that it has been D.to have been 选C还是选D啊?时间又是过去..选D

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Aidsissaid_____thebiggesthealthchallengetobothmenandwomenoverthepastfewyears.A.thatitisB.tobeC.thati

Aids is said_____ the biggest health challenge to both men and women over the past few years.A.that it is B.to be C.that it has been D.to have been 选C还是选D啊?时间又是过去..选D
Aids is said_____ the biggest health challenge to both men and women over the past few years.
A.that it is B.to be
C.that it has been D.to have been
选C还是选D啊?时间又是过去..选D

Aids is said_____ the biggest health challenge to both men and women over the past few years.A.that it is B.to be C.that it has been D.to have been 选C还是选D啊?时间又是过去..选D
It is said that..或者 主语+ is said to be...这是常用的固定句型,由此,A、C语法上时错误的.再看时间,“over the past few years”,明显是过去已经完成的了,所以选D.
楼上的看清楚,主语是“Aids”,而不是形式主语It...C是错误的

选择D.时间限制为over the past few years表示在过去的一段时间内的动作(客观事实),没有涉及是否继续延续下去.故可以是to have been,to be ,to have been being在给出的选项中最佳为D.

选C为好。
"is said"据说后面更随that it has been……
现在完成时的完整句子做宾语从句。
选D也不错。
"is said"据说后面更随to have been 现在完成时动词不定式做宾语.语法逻辑都对。

选D.

Decembeir1,2006 is the World AIDS Day?A.17th B.18th C.19th D.20th Aids is said_____ the biggest health challenge to both men and women over the past few years.A.that it is B.to be C.that it has been D.to have been Aids is said_____ the biggest health challenge to both men and women over the past few years.A.that it is B.to be C.that it has been D.to have been 选C还是选D啊?时间又是过去..选D World AIDS Day is now in its 17th year,It is observed annually on December1.Women,Girls,HIV and AIDSis the t____ of the 2004 World AIDS Day.Last year,almost 500000 children under age 15 died from AIDS.In additong,about 15 million children have lost What do you know about AIDS?/ what is AIDS?的中文意思 What is the theme of World Aids Day in 2005 what is the theme of world aids day in 2006 What is the theme of World Aids Day in 2006 AIDS is still out there and it still kills RT 英文翻译 AIDS aids是什么意思 May I love her or married her if she is a AIDS I love her very much but she is a AIDS patient. Is this something that we can stand No,the AIDS is not cover.翻译 i hope our efforts( which is )to prevent AIDS 中which is 可省吗 He's dead.The policeman said_____ 英语翻译原文：In the United States,finding aids have evolved throughout the 20th century.In the past several decades,the pace of this evolution has quickened.In this evolution,the information elements within finding aids that facilitate access ( )25th is Christmas Day march 8th is W______Day