802. The letter "x" stands for an unknown number.字母x代表未知数。

　　803. The sight of the dead body scared him stiff.看到尸体把他吓僵了。

　　804. There are lots of huge buildings in Beijing.在北京有许多高大的建筑物。

　　805. There is an interesting film on Channel one.在一频道有一部有趣的电影。

　　806. They plan to immigrate to Finland next year.他们计划明年移居芬兰。

　　807. We enjoyed driving along the new expressway.我们喜欢沿着新建的高速公路开车。

　　808. We need to cooperate perfectly to win the game.要想赢得比赛，我们需要密切配合。

　　809. We need more than listening. We need action!我们需要的不光是听得进意见，我们要的是行动。

　　810. Yes. I wouldn't go home early if I were you.是的，如果我是你，我不会早回家。

　　811. Your answer is satisfying. I feel satisfied.你的答案是令人满意的。我感到很满意。

　　812. Betty and Susan are talking on the telephone.贝蒂和苏珊正在通电话。

　　813. Great efforts ensure the success of our work.巨大的努力确保了我们工作的成功。

　　814. He has tasted the sweets and bitters of life.他已尝遍了人生的甜酸苦辣。

　　815. He said he was educated in the United States.他说他是在美国受的教育。

　　816. How do you like our English literature Prof.?你觉得我们的英国文学课的教授怎么样?

　　817. I am looking forward to your visit next week.我期待着你下周来访。

　　818. I feel I am the happiest person in the world.我觉得自己是世界上最幸福的人了。

　　819. I had to sit up all night writing the report.我不得不熬通宵写报告。

　　820. I hope we can see each other again some time.希望还能有相见的机会。

　　821. I saw him playing football on the playground.我看见他在操场上踢足球。

　　822. It is tomorrow that they will have a meeting.就在明天(而不是在别的某一天)他们要开会。

　　823. Let me tell you some details about clearance.让我告诉你一些通关的细节。

　　824. The brain needs a continuous supply of blood.大脑需要连续不断地供血。

　　825. The doctor's words made him feel comfortable.医生的话让他感觉很舒服。

　　826. The truth is quite other than what you think.事实真相和你所想的完全不同。

　　827. They stopped talking when their boss came in.当老板进来的时候;他们停止了交谈。

　　828. They were glad of the examination being over.他们为考试结束了而高兴。

　　829. This is by far the largest cake in the world.这是目前世界上最大的蛋糕了。

　　830. Whichever you choose, you won't be satisfied.不论你选择哪一个，你都不会满意。

　　831. Will you connect this wire to the television ?你把这根电线和电视机连上好吗?

　　832. His words are strongly impressed on my memory.他的话深深地铭记在我的心头。

　　833. Is this the fight bus for the Capital Library?这辆车到首都图书馆吗?

　　834. One third of this area is covered with forest.这一地区三分之一的地方都是森林。

　　835. They are arguing over who should pay the bill.他们为谁应该付款而争论不休。

　　836. Wait a moment, I'll be with you in an instant.等一下，我立刻就来。

　　837. You'll save time not waiting for the elevator.你可以节省等电梯的时间。

　　838. A clear conscience laughs at false accusation.只要问心无愧，无端的指责可以一笑置之。

　　839. I have a headache, and she has a stomachache.我头疼，她胃疼。

　　840. He glared at Bill, ready to teach him a lesson.他怒视着比尔，准备教训他一顿。

　　841. I assure you that you will feel no pain at all.我保证你根本不会觉得疼的。

　　842. I can't afford to go to a restaurant every day.每天都去餐馆吃饭，我真是支付不起。

　　843. I left at 6:00 so that I could catch the train.我六点钟出门，以便赶上火车。

　　844. I'm afraid I have some rather bad news for you.我恐怕有些很坏的消息要告诉你。

　　845. Learn to say the fight thing at the fight time.学会在适当的时候说适当的话。

　　846. No wonder you can't sleep when you eat so much.你吃这么多难怪睡不着。

　　847. Please ask her to call me back when she's back.她回来时请让她给我回个电话。

　　848. There are a lot of people in the swimming pool.游泳池里挤满了人。

　　849. They have to work hard to support their family.他们必须努力工作来支持他们的家。

　　850. This way, he can kill two birds with one stone.这样他就能两全其美。