—How long are you staying? --I don’t know. _____A. That’s OK. B Never mind. C. It all depends. D. It doesn’t matter.
—There is still a copy of the book in the library. Will you go and borrow ____? —No, I’d rather buy ____ in the bookstore.
We must take measures to stop various kinds of pollution ______ the environment gets worse.
The rumor has been confirmed __________ UN peacekeeping forces would take operations in the region .
Hearing his friend calling him , out __________ .
Whatever happens, you may depend on ________ that I will be with you.