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...gradually from AD200 to AD400. A.to cover ..
sb\/sth is reported \/believed to do\/to have done,可以转化成It is reported \/believed that句型，解答这类题目，关键是理解题干意思从而判断是动词不定式的什么形式，根据意思放入句子中进行比较，不难选出正确答案。
...from AD 200 to AD 400. A.gradually cover B.be gr.
C 试题分析:句意：人们都认为它是在公元200年到公元400年期间被风沙逐渐覆盖的。固定句型：sb is believed to do “人们认为……”，相当于it is believed that +从句，故答案选C。
...the chinese friend,and he give money,it is a crime for an alie...
2.WhatisitthatfoundintheeverycenterofAmericaandAustralia?3.Whyisariverrich?4.Whichletterisveryusefultoadeafwoman?5.Whichrunsfaster,heatorcold?Why?6.下面是一道经典的英语填空题,注意,所有空格均为同一个单词:___isgreaterthanGod.___ismoreevilthantheDevil.Thepoorneed___.Therichhave___.Ifyoueat___...
