16．He gave my sister useful book yesterday．A．a(chǎn)n B．a(chǎn) C．the D．/ 【查看更多】

 

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He gave my sister_______useful book yesterday．

A．a(chǎn)n         B．a(chǎn)          C．the        D．/

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He gave my sister ________ useful book yesterday．

[　　]

A．an

B．a

C．×

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