1．I think it's useful advice.so I will always remember it．A．a B．an C．the D．不填 【查看更多】

 

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I think it’s_________ useful advice，so I will always remember it．  

A．aB．anC．theD．/

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I think it’s_________ useful advice，so I will always remember it．  

A．a                B．an               C．the              D．/

 

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I think it’s_________ useful advice，so I will always remember it．  
A．aB．anC．theD．/

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I think it's          useful advice，so I will always remember it．

A．a                         B．an                       C．the                        D．不填

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