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 |
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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 |