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Every year, _____ energy is spent on environment protection.

It is reported that the number of students_______ computer games has been on the increase in recent years.

People are advised to lay particular ____ the need of a balanced diet and proper exercise.

---- Did he give you advice on your work yesterday?
---- Yes. But his advice, as a matter of fact, ______ my difficulty.

These tax laws which are intended for domestic companies do not _____ to foreign companies.

A large number of people are _____, and how can the local government ignore the problem?

You can take the rest of the pie with you. ___________, I wish you would, since I’m on a diet.

  As the road to the airport is under reconstruction, we’d better ______early to avoid  the traffic jam,
A, pay off  B. set off  C. put off  D. take off

Mary often does some translation work to earn extra money, which      half of her income.

-- Have you been to the Great Wall?
-- Perhaps not in my memory. _______, it might have been during my early childhood.