______ you are supposed to do ______ you don’t like a thing is ______ itDon’t complain

Will Jack go to the meeting tomorrow.–If you don’t go, _____________.

I’ve never read a better book than this one. ___________, it is the best one that I have ever read.

any forests being destroyed, huge quantities of good earth ______ each year.

When I entered the step-classroom(阶梯教室), the lecture _________ and the people _________ attentively.