If someone has an accident and can no longer walk, scientists might be able to use stem cells to ___ the damaged cells and allow that person to walk again.

1. A.
   rescue
2. B.
   remove
3. C.
   reserve
4. D.
   replace

If someone has an accident and can no longer walk, scientists might be able to use stem cells to ___ the damaged cells and allow that person to walk again.

A. rescue          B. remove             C. reserve             D. replace

If someone has an accident and can no longer walk, scientists might be able to use stem cells to ___ the damaged cells and allow that person to walk again.