_______ progress it is, you can’t stop moving forward.

I think English is __________ unimportant subject.— I don’t think so. It is __________ useful tool when we talk with foreigners.

English is___ useful language because people in many countries are using it.

Why are you so tired these days?—Well, I have ________ homework to do.

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