31.The paper is very old and easily, so you must be careful. A. is tearing B. is torn C. tears D. tore 查看更多

 

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The paper is very old and ________ easily, so you must be careful.

A. is tearing     B. is torn  C. tears    D. tore

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 The paper is very old and ________ easily, so you must be careful.

A. is tearing      B. is torn         C. tears           D. tore

 

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