He _____ be really difficult at times even though he ,generally speaking, is a nice person. 

Must we finish all the homework today or tomorrow?                    – You ____ worry about it. You may hand it in next week. 

Sometimes we have much homework to do, but not often. Anyway, it ______in time.

—Some countries are taking action to occupy the islands of the South China Sea.—Yes, but I think they ____be punished sooner or later.

If you have finished most of the work, you ______ start working so early tomorrow.