阅读理解。阅读下列短文,根据短文选择最佳答案。
Bruce:Mother.This is my friend, Frank.
Frank:Nice to meet you, Mrs.Collins.
Mrs.Collins:Nice to meet you, too, Frank.
Bruce:And these are my grandparents, Leo and Ruth Collins.That's my brother, Kevin, and this is my cousin, Peter.
Frank:And is this your sister?
Bruce:Yes, this is Emily.
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