The cockies _____ good, could I have some more?
The population of the world in 20 century became very much _____than that in 19 century.
If I’m free,I’d like to spend ______holiday in Dunhuang.
----_______ do you have out with your friends?----Once a week.
The accident took place ______ a cold February evening.
Don’t eat ________meat.If you do so, you’ll get ______ fat.