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________ your composition carefully, some spelling mistakes can be avoided.

A. Having checked B. Check              C. If you check   D. To check

_________ your composition carefully, some spelling mistakes can be avoided.

         A. Having checked     B. Check          C. If you check         D. To check 

_______ your composition carefully, some spelling mistakes can be avoided.

A. Having checked B. Check

C. If you check      D. To check

________ your composition carefully, some spelling mistakes can be avoided.

   A. Having checked     B. Check             C. If you check          D. To check  

________ your composition carefully, some spelling mistakes can be avoided.

A. Having checked    B. Check            C. If you check    D. To check