【题目】Please go on trying.I’m sure the efforts you are________will pay off.

【题目】________ computer lessons, designed for children, is an important qualification for the job.

【题目】There is still a long way to go to solve all the problems _________conservation of natural resources.

【题目】—What would you like, tea or coffee?

【题目】I’d appreciate________if you would turn out the lights.I’m sleepy.

【题目】The train had stopped _______ a mechanical problem and I just called to the engineer to repair it.

【题目】With economy rapidly _______,people are more and more concerned about health.

【题目】—Shall we ask Bob to help us do the work ?

【题目】Your digital camera is very nice. Where did you buy_____? I’d like to buy _____, too.

【题目】I _________ him to take the train, but he wouldn’t.