____doesn't seem to have been any trouble in solving this problemA ItB thereC thatD he答案是b,我想问怎么解释这个选项.并请分析下为什么不选a为什么是there be的句型呢?怎么看出来的呢?

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____doesn't seem to have been any trouble in solving this problemA ItB thereC thatD he答案是b,我想问怎么解释这个选项.并请分析下为什么不选a为什么是there be的句型呢?怎么看出来的呢?
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____doesn't seem to have been any trouble in solving this problemA ItB thereC thatD he答案是b,我想问怎么解释这个选项.并请分析下为什么不选a为什么是there be的句型呢?怎么看出来的呢?
____doesn't seem to have been any trouble in solving this problem
A It
B there
C that
D he
答案是b,我想问怎么解释这个选项.并请分析下为什么不选a
为什么是there be的句型呢?怎么看出来的呢?

____doesn't seem to have been any trouble in solving this problemA ItB thereC thatD he答案是b,我想问怎么解释这个选项.并请分析下为什么不选a为什么是there be的句型呢?怎么看出来的呢?
这就是一个there be in sth的句型的变型
如果用it的话
后面必须有形式主语
改成it doesn't seem to have been anytrouble to solve this problem

记住吧,这是there be 的一种用法,be 可以用一些词组代替.再给你点素材吧
there happen to be ,,remain,,enter,live, stand,lie.etc