My sister will never speak to others like that ________they say something unpleasant to her .
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.
Mary is very late, she ______.
Most of the artists _______ to the party were from South Africa.