— How often do you drink milk?  —I don’t like it, so I _____drink it. 

 Don’t put the bag _______ on the ground. The things in the bag are easily broken.

—____ do you clean your room?—Every two days.

In America when you’re given a present, you can open it      . You don’t have to wait.

--- English is _________ so difficult to me. I can’t learn it well.--- Don’t give up(放弃).