—How do you deal with the disagreement between the compnay and the customers ?--- The key ________ the problem is to meet the demand _________ by the cutmoerss.
The thing that ________ is not whether you fail or not, but whether you try or not.
—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 __________ .