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Here a set of keys and here my books.
A.are ,is B.is ,is C.is ,are D.are ,are
1This __________my quilt，These __________my books.
A．is．is B．is，are C．are，are D．are，is
-- ?
--They are my books.
A. What are those B. What is that C. What is those D. What is this