问个英语问题He is watching TV?He's ______ to be cleaning his room.

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问个英语问题
He is watching TV?He's ______ to be cleaning his room.
A.known B.supposed c.regarded D.considered
为什么选A而不选D?
In 1914,an apparently insignificant event in a remote part of Eastern Europe _____Eyrope into a great war.
A.inserted B.imposed C.plunged D.pitched
为什么选C不选A?
The car is quite ____ of petrol.
A.economic B.economical C.saving D.sparing
为什么选B?和A有什么区别?

1、我认为第一题的答案应该是B,be supposed to do 是应该去做某事的意思,符合语境~ACD三项在这里其实都是一个意思,不符语义
2、plunge into 有陷入某种状态的意思,而insert没有
相关例句：The country plunged into civil war after the death of the President.总统死后全国陷入了内战.
3、economic指的是经济领域上的,例如This is an economic question.
economical指经济实惠,价格合理,please do it in an economical way!

问个英语问题He is watching TV?He's ______ to be cleaning his room. 请帮忙翻译一下He’s watching TV?He’s supposed to be cleaning his roo He's cleaning his room.对cleaning his room提问. He's cleaning his rooms对claning his room提问 he is watching TV in the _（sit） room He is c( ) about watching TV.And his mother is 一个英语时态的问题他在看电视过去 He watched TV现在 He is watching TV将来 He will 英语选择 1.______ he has finished cleaning the room is unknown. 问一道英语语法问题.The boy spent as much time watching TV as he ___ s 初三英语填空he spends his free time watching tv ( ) 1.He said he ______ TV then.A.watches B.is watching C.wa 14.He didn’t seem to mind their watching TV ______ he was tr