【题目】—______ she your sister? ( )
—No, she isn't. She's my friend.
A.Am B.Is C.Are
【答案】B
【解析】
问句主语she为第三人称单数，be动词应用is，故选B。
【题目】—______ she your sister? ( )
—No, she isn't. She's my friend.
A.Am B.Is C.Are
【答案】B
【解析】
问句主语she为第三人称单数，be动词应用is，故选B。
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