㈡Cathy : What are those in the pond?Helen : Oh, they are tadpoles. Frogs lay (產下) their eggs in water, and then they hatch (孵化) into tadpoles. Tadpoles' skin is dark, but frogs' skin is green.Cathy : How long does it take (花費...時間) for a tadpole to become (成為) a frog?Helen : Some only need a few(一些) weeks, and some need more time. When (當) they are tadpoles, they live in the water like (像) fish. They first (先) have their back legs, and then have the front（前面的）legs. When their tails (尾巴) disappear(消失), they become baby frogs. Frogs can live on land（陸地）, and they also can live in the water.Cathy : Wow! You know a lot about frogs.Helen : Oh, when I was a kid, I lived (live的過去式) with my grandparents. There was a pond in front of my grandparents' house, and there were many tadpoles in it.Cathy : I see.
【題組】5. Where do tadpoles live?
(A) In water.
(B) On land.
(C) On the hill.
(D) On the tree.