完形填空The sun,the moon and the stars are ( 1 ) the sky.We see

完形填空
The sun,the moon and the stars are ( 1 ) the sky.We see the sun in the day and the moon and the stars at night.We see well during the day because it is bright.We don't see so ( 2 ) at night because it is dark.
1 A.in B.at C.on
2 A.badly B.good C.well