The old man has run four laps(圈) around the pool, while the younger one was almost after only one lap.[ ]

,____ country in Central America, isthe only place in the world ____ someone can see the sun rise on the PacificOcean and set on the Atlantic

下列各句中，没有语病的一句是（ ）

The audience ______ to see who would win the goldmedal.

_ wellprepared a gymnast is, he still needs a lot of luck in performing.