THE FIRST FISH APPEARED ON THE EARTH ABOUT 500 MILLION YEARS AGO.UP...

1. - THI GIAO VIEN GIOI HAY LAM
THI GIAO VIEN GIOI HAY LAM

1.The first fish appeared on the earth about 500 million years ago.Up to

now,over 20,000 kinds of fish (name) ……… ..and (describes)

..by scientists.

……