选哪个,请给出原因.________,the gathering crowd burst into applauses.A.On entering the hall B.When the hero entered the hall C.The hero entered the hallD.Devoting to bring up.

选哪个,请给出原因.Having been attacked by terrorists,________.A.doctors came to their rescue B.the tall building collapsed C.an emergency measure was taken D.warnings were given to tourists. 选哪个,请给出原因.-----Where's your assignment?-----________.A.I had already handed it in.B.It was handed in.C.It'd been handed in.D.It's been handed in. 选哪个,请给出原因.________,the gathering crowd burst into applauses.A.On entering the hall B.When the hero entered the hall C.The hero entered the hallD.Devoting to bring up. 选哪个,请给出原因.Fiona did the opposite of what I asked her to do.She______what I said.A.might not have understood B.can't understand C.can't have understood D.mustn't understood be/get caught inThey ________ a heavy snow on their way home.A:got caught in B:be cought in选哪个?给出原因. 选哪个,请给出原因.A.where B.that C.when D.whichChina's new food law provides for a food recall system______producers have to stop production if their food isn't up to standards. 选哪个,请给出原因.A.Thinking B.To be viewed C.Viewed D.Considering__________as one fo the most talented artist in European history,Van Gogh couldn't have sold a single work without his brother's assistance. 选哪个,请说明原因, Don't laugh at ________(me/I)该选哪个? 植物细胞中线粒体和叶绿体中哪个CO2浓度高?请给出详细原因… sin(t^2)的傅里叶变换,若其没有解析解,请给出原因 关于take costQipao doesn't ____much material.cost or take?原因?请给出令人信服的理由 We ________ the room for your party,Amy.A.need cleaned B.needn't to ciean C.don't need to clean选哪个,同时说出原因,needn't to do和don't need to do 有什么区别. 选哪个,请给出原因.A.are they to work B.were they to work C.had they worked D.have they workedMany young graduates don't want to work because they think that______,they probably wouldn't be able to enjoy an easy and colourful life 关于may的否定回答的题目May I watch TV now?No,you ________ A.don’t B.mustn’t C.can’t D.may not选哪个最好说明原因 选哪个,请给出原因.A.used B.has been used C.using D.is usingThe computer,now______by millions of people,has changed the world 选哪个,请给出原因.A.in B.for C.on D.withThe temperature today is very low.It is quite cold______June in shanghai. 选哪个,请给出原因.A.proving B.proved C.was proved D.has been provedThe cause he had devoted himself to _______a perfect success.