The driver could have survived,  but he ____ the seat belt.

-- Could you give these books to Mr. Mackintosh?-- Certainly, ______ him about something else in any case, so it won’t be any bother.

In the past five years China ________ great _________.

--It’s a pity that you didn’t come to my birthday party last night.--I’m terribly sorry. I ________ for an important lecture.

--Growing population resulted in growing rubbish. --There is possibility that rubbish ________the major threat to human beings.