When you do exercises, your heart works better. It is able to______ more blood while beating more slowly.

1. A.
   produce
2. B.
   pump
3. C.
   increase
4. D.
   bump

When you do exercises, your heart works better. It is able to______ more blood while beating more slowly.

A. produce                     B. pump                       C. increase                    D. bump

When you do exercises, your heart works better. It is able to______ more blood while beating more slowly.

A. produce   B. pump    C. increase   D. bump

When you do exercises, your heart works better. It is able to______ more blood while beating more slowly.

A. produce　　　 B. pump　　　　　　 C. increase　　　　 D. bump