(届北京市朝阳区高三第一次综合练习英语试卷)—Putting on a happy face not only helps us make friends but also makes us feel better. —_______.
Ladies and gentlemen, please fasten your seat belts. The plane ______ in five minutes.
---The meeting has begun and __________ he will come. ---Of course, he is sure to come. He’ll speak at the meeting.
—What do you think of this matter? —This is a matter of__________ importance. I think.
Some countries are increasing their use of natural gas, and other forms of __________.
Though he is __________ worker, he works very hard.