2. 外语
  3. There ______ more than 200,000 overseas domestic servants working in Britain.

There ______ more than 200,000 overseas domestic servants working in Britain.

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问题 There ______ more than 200,000 overseas domestic servants working in Britain.
选项 A、is estimated to be
B、are estimated being
C、are estimated to be
D、is estimated being
答案C
解析 There be句型题。There be句型可以和动词的被动语态一起使用，常用结构有：There is／are expected to be．．．(预计……)；There is／are known to be．．．(据人们所知……)；There is／are estimated to be．．．(据估计……)。本题的真实主语为200,000 overseas domestic servants，为复数形式，故C正确。
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