From space, the earth looks blue.This is ________about seventy-one percent of its surface is covered by water.
There was a terrible noise ______ the sudden burst of light.
If it is fine tomorrow, we ______ a football match.
When he was at school, he ______ early and take a walk before breakfast.
In the past 30 years China ______ great advances in the socialist revolution and socialist construction.
I ______ go to bed until I ______ finished my work.