问题描述：
—Is this your brother?—__________.A.Yes,he is B
—Is this your brother?
—__________.
A.Yes,he is
B.Yes,she is
C.Yes,it is
D.No,it is
—Is this your brother?
—__________.
A.Yes,he is
B.Yes,she is
C.Yes,it is
D.No,it is
问题解答：
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