问题描述：
_______ of them are famous doctors,but ______ of them has been to Britain.
—Has ______ lost this watch?
—Yes,but we can’t find out who.
A.anybody B.someone C.one D.some
为什么答案选a不选b
—Has ______ lost this watch?
—Yes,but we can’t find out who.
A.anybody B.someone C.one D.some
为什么答案选a不选b
问题解答：
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