,it immediately ran way.(新概念英语选择题）A：Observing her B:On being observed C:Having been observed D:On her being observed

------,it immediately ran away.B.On being observing C.Having been observed为什么不选C 这道英语题为什么选b 不选c ______,it immediately ran away 新概念3中的,on being observed,it immediately ran away.这个on doing 到底是什么结构呀? 新概念3中的,on being observed,it immediately ran away.这个on doing 到底是什么结构呀? 英语翻译It immediately ran away when she saw it,and experts confirmed that a puma will not attack a human being unless it is cornered On being observed,it immediately ran away.这个句子不是很明白尤其是 on being observed 这个地方不明白为什么这么用. （）,it immediately ran away.A.on being observed B.having been observed这个为什么选A 我觉得B比较对.新概念第三册的第一篇 ,it immediately ran way.(新概念英语选择题）A：Observing her B:On being observed C:Having been observed D:On her being observed 新概念3课后习题6.It immediately ran away when she saw it=_______,it immediately ran away.(a)Observing her (b)On being observed (c)Having been observed (d) On her being observed 选B,为什么不选C?7.Pumas never attack a human being except __ on its being observed, it immediately ran away.为什么用its?新概念3中的课后练习：___________, it immediately ran away.有两个正确答案：I. on being observed II. 或者替换成 on its being observed,问：II中的句子,为什么 ran after it 新概念英语上的问题._,it immediately ran away.a.Observing her b.On being observedc.Having been observed d.On her being observed这道题为什么选b?其他几个为什么不选? hit it off immediately 啥意思? 新概念3时态 experts confirmed that a puma will not attack a human being.原句:It immediately ran away when she see it,and experts confirmed that a puma will not attack a human being unless it is cornered.这里confirmed (过去时) 为何它的 ran 译l immediately recognize that something was wrong and ran down to the edge of the near bank 英语 （出自新概念英语第三册课后练习第一课）___ ,it immediately ran away.a.Observing her b.On being observed c.Having benn oberved d.On her being observed谁能给我讲下这种语法结构吗?为什么c不可以呢? 1 （）,it immediately ran away.a.Observing her b.On being oberved c.Having been oberved d.On her being oberverd2 The experts were now fully convinced that the animal ( ) a puma.a.must be b.should have been c.can only be d.could only have been