下列各句中，没有语病的一句是（ ）

The islands developed on their own for 80million years and _______ have many rareanimals found nowhere else

In the past two years, the number of campus bookstores offering rentals _____ from a few dozen to1,500.[ ]

You must be tired now. Why not stop ________ a rest

We meant to finish the work by dark, but we were so tired that we could not ______.