问题描述：
___ the students ____ their teacher has been to the History Museum
A.are is B.is is C.is are D.are are
选项错了
BOTH AND B.EITHER OR c.not only but also D.neither nor
A.are is B.is is C.is are D.are are
选项错了
BOTH AND B.EITHER OR c.not only but also D.neither nor
问题解答：
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