( )I have old pen and my brother has new one. A.a, an B.an, a C.a, a——青夏教育精英家教网—

摘要：( )I have old pen and my brother has new one. A.a, an B.an, a C.a, a

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I have old pen and my brother has________new one.
A.a, an B.an, a C.a, a