请写清楚原因,In my opinion ,life in the twenty-one century is much easier than ——.A.that used to B.it used to be C.it was used to be D.it is used to

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请写清楚原因,Inmyopinion,lifeinthetwenty-onecenturyismucheasierthan——.A.thatusedtoB.itusedtobeC.itwasusedt

请写清楚原因,In my opinion ,life in the twenty-one century is much easier than ——.A.that used to B.it used to be C.it was used to be D.it is used to
请写清楚原因,
In my opinion ,life in the twenty-one century is much easier than ——.
A.that used to B.it used to be C.it was used to be D.it is used to

请写清楚原因,In my opinion ,life in the twenty-one century is much easier than ——.A.that used to B.it used to be C.it was used to be D.it is used to
B
used to,常常、以往,指过去的一个状态,后接动词原形
be used to,习惯于
根据题意,应该是与过去生活相比

D
同一个人或物,两个不同的时间进行对比时,应该用人称代词。

B
依我之见,二十一世纪的生活比过去要容易得多

B 你可以翻译一下整个句子的