一个英语问题Life in the country is much better than ____ used to b

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一个英语问题
Life in the country is much better than ____ used to be 10 years ago .
A.what B.that C.it D.which
此题选C.A为什么不对?

1.如果用A what的话,则从句是what used to be 10 years ago.
楼主可以想一下,what在该从句到底做什么成分呢?
1）如果what充当该从句的主语,则be后面的表语到哪里去了呢?
2）如果what充当该从句的be后的表语,则从句的主语到哪里去呢?
所以,用what则导致该从句总是缺少一个成分,所以答案A错误.
2.如果用C it的话,则从句是it used to be 10 years ago.
it做该从句的主语,相当于主句的主语life in the country；
而且该比较状语从句it used to be 10 years ago和主句Life in the country is much better刚好对应,只不过从句存在省略而已.
再如：I'm taller than he is.

life in the country is much better than___ used to be 10 yea ____,living in the country is much better than living in big Life today is much better than() in the old days. Life is much easier than it____.A.uses B.used C.used to D.us 英语the in is city country slowr life the than in 连词成句 To the boys life in the country is more interesting than tha 改写一个英语句子"Life is like walking in the snow",Granny used to sa 英语辩论 the real life is better than vitrue life In life,patience is the key.It is much better to be going so 英语作文where is it better to live in the city or in the country The weather in Beijing is much better than ( )选择改错：My sister is used to live in the country