Write the beginning and end of the tortoise.

Beginning: Last winter, my mother bought me a little turtle. This little turtle is very cute. It carries a dark green shell all day, with its neck sticking out from under the shell, a sharp little head, a pair of round eyes on both sides, and four strong calves swinging constantly. As long as there is a little movement, it quickly retracts its head, legs and small tail into the turtle shell. I named it "Smart".