1.There are millions of stars in the sky.

1.There are millions of stars in the sky.
If you look (1) the sky on a clear night,it is possible to see about 3000 stars.Ther look small,but they (2) really (3) big hot balls of burning gas.
(1) A at b up C on
(2) A that B are C is
(3) A very B too C much
2.On August,1492,Christopher Columbus set sail from Spain to find a new route to India,China and Japan.(1) this tima people thought you would (2) off the edge of the world if you sailed too far.
(1)A At B On C With
(2)A stand B fall C sleep