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 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 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.B.On being observing C.Having been observed为什么不选C 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? （）,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 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? 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 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 __ ____,the deer immediately went away.A.Observing B.Haying observedC.On being observed D.To be observed 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? 新概念3 第一课第六题6 ...,it immediately ran away.B.On being observed C.Having been observed我觉得C也可以,现在分词的完成形式,说明它表示的动作在主要谓语表示的动作之前,这样题例的意思就是美洲狮在 1:People said ____ the animal.A:to have seen B:they saw2:____it immediately ran away.A:Observing her B:On being observed C:Having been observedD:On her being observed 帮我看看这段英语有语法错误吗?It can be observed in the picture that there is a boy who racing in the ground while he arrived the race line, but he being not stop running with smile dawned on face and sweat streamed on head. And he wears while （）an efficiency test on an engine ,certain precautions should be observed.a making b to make c being made d made.thanks a lot. 新概念3第一课puma at a large课后的多项选择题中的结构题（新版的是17页）___________________it immediately ran away.a) Observing her b)On being observedc)Having been observed d) On her being observed选什么呢 原因? on being Being on