st thirty years _____ the greatestnumber of laws stopping our rights and progress,until today we have reached astage ____ we have almost no rights at all
I don’t like those two coats because ________ of them fits me.
I am thirsty. Could you let me have ______coke
Why didn’t you go to Mike’s birthday party yesterday? — Well, I _____but I forget it. [ ]
The environmental problems in China may worsen if__________ unsolved