题目

以及详细的原因,
1.____,it immediately ran away.
a.Observing her b.On being observed c.Having been observed d.On her being observed
2.The accumulating evidence made the experts _____ the animal was a puma
a.to think b.thinking c.think d.thought
3.____ the first sentence,the editor refused to publish the article.
a.Reading b.Having read c.He read d.Being read
4.____ so many peole about,the dogs have to be kept in an enclosure.
a.With b,Being c.Because d.Having
5_____ the cap,the Officer put up the bottle to his nostrils.
a.Having unscrewed b.Uncrewed c.Being unscrewed d.With uncrewed
6.____ to frighten the poor man,Mrs.Richards quickly hid under the stairs.
a.Not anxious about b.Anxious not c.Being not anxious d.Not being anxious for
7.____ in human endeavour or thought would be unchanged.
a.All things b.Evering c.Nothing d.None
8.It has become possible _____ recent developments in astronomy to.
a.caused by b.through c.as regards d

提问时间：2021-04-01

答案

1,B最合适.这句话的关键还是前后的主语要一致,还要符合逻辑.意思是说：刚一被观察,它就跑掉了.on doing...这里有一怎么样就.的意思.a 没有那种紧迫感,如果是小动物的话一看见人就会逃之夭夭的吧.
2,c.make 后面的不定式是没有to 的 意思是：累积下来的证据让专家们认为这个动物是只美洲狮.不要听楼上的胡说,这里没有被动的语气.
3,b .和第一题一样,只不过在这里有已经完成的意味在里面.意思是：读完了第一句,编辑拒绝发表该文章.
4,a.比较一下还是a比较好.狗是不会have的,最好是用介词.d可不可以我也说不清楚.
5,a 这里表示完成的先后顺序,如果不把瓶子盖拧开就不能闻到瓶子里东西的味道.
6,c.依然是现在分词表示原因,注意d的说法是错误的.要把not放在联系动词的后面.意思是：不急着把这个可怜的人吓一跳,理查德太太躲在了楼梯下面.
7,c 经常有的双重否定的句子表示肯定.
8,b 表示通过.的意思.意思：通过近期天文学的发展.已经成为可能.
好了全完成了,很累啊,虽然可能不完全正确但是我用心了.加不加分你自己看着办了.
拜托楼上既然不懂就不要胡说了好不好.错的太离谱了.