Birth, marriage and death: these are the greatest events in human life. Many things, good and bad, can happen to us in our lives. Yet there are three days which are usually marked by some kind of special ceremony: the day we are born: the day we get married and the day wedie. These are the three main events in life. We only have a choice in the second of these: we can choose whether or not to marry. But we have no choice in birth and death. All human beings—from the most primitive to the most sophisticated —are affected by these three events. The only thing that differs in each society is the way these events are celebrated. Yet all societies share common characteristics. Birth is a time of joy. The proud parents receive congratulations and presents on behalf of the new-born. Marriage is also a time of joy. The young couple go through a special wedding ceremony and receive presents to help them set up their home. Death is a time of sorrow and is marked by a special ceremony and mourning. The dates of all three events are usually remembered.

Expected noises are usually more( )than unexpected ones of the like magnitude.

______, he can't educate his child well.

The doctor will not perform the operation______it is absolutely necessary.

Mr. and Mrs. Wright have got nine children—it's really a big______.

Hard______they tried, they failed to climb to the mountain top

By the time you arrive this evening, ______for two hours.

The chairman of the department, together with some other teachers, ______a conference for the purpose of laying down certain regulations.

With the conditions constantly changing, the result of the experiment is not always______.

A woman and a man get into a car accident, and it' s a bad one. Both cars are totally destroyed, but amazingly【C1】______of them is hurt. After they crawl out of their cars, the woman says, " So you're a man, that's interesting. And I'm a woman... Wow! Just【C2】______our cars. There's nothing left, but【C3】______we are unhurt. This must be a sign from God that【C4】______should meet and become friends and live together in peace the rest of our days." The man replies, " I agree with you completely: this must be a sign from God!" The woman continues, "And look at this—here' s another【C5】______. My car is completely destroyed【C6】______this bottle of wine didn' t break. Surely God wants us to drink this wine and【C7】______our good fortune." So she hands the bottle to the man. The man nods his head【C8】______, opens it and takes a few big swallows from the bottle, then hands it back to the woman. The woman takes the bottle, immediately【C9】______the cap back on, and hands it back to the man. The man takes the bottle and asks, "Aren' t you having any?" The woman replies, "No. I think I will just【C10】______the police..."

It was a chilly November evening in New York City, and my daughter and I were walking up Broadway. Nora noticed a guy sitting inside a cardboard box next to a newsstand. She pulled at my coat sleeve and said, "That man' s cold, Daddy. Can we take him home?" I don't remember my reply, but I do remember a sudden heavy feeling inside me. I had always been delighted at how much my daughter noticed in her world, whether it was birds in flight or children playing. But now she was noticing suffering and poverty. She wasn' t even four. A few days later, I saw an article in the newspaper about volunteers who delivered meals to elderly people. The volunteers went to a nearby school on a Sunday morning, picked up a food package, and delivered it to an elderly person. I signed us up. Nora was excited about it. She could understand the importance of food, so she could easily see how valuable our job was. When Sunday came, we picked up the package and phoned the elderly person we' d been assigned. She invited us right over. The building was depressing. When the door opened, facing us was a silver-haired woman in an old dress. She took the package and asked if we would like to come in. Nora ran inside. I reluctantly followed. Our hostess showed us some photos of her family. Nora played and laughed. I accepted a second cup of tea. When it came time to say good-bye, we three stood in the doorway and hugged. I walked home in tears. Where else but as volunteers do you have the opportunity to do something enjoyable that' s good for yourself as well as for others? Indeed, the poverty my daughter and I helped lessen that Sunday afternoon was not the woman' s alone—it was in our lives, too. Now Nora and I regularly serve meals to needy people and collect clothes for the homeless. Yet, as I' ve watched her grow over these past four years, I still wonder—which of us has benefited more?

A healthy diet is______for maintaining good overall health.

One day, science says a glass of red wine a day will help us live longer.

Obviously, there would be no point in investing(投入) in a computer if you had to check all its answers, but people should also rely on their own internal computers and check the machine when they have the feeling that something has gone wrong.

The way the Earth interacts with the sun' s energy can be displayed in a diagram called the Earth's energy budget. It displays the sun' s energy that reaches us and【C1】______of that energy is absorbed and reflected【C2】______the earth and its atmosphere. Solar energy reaches earth as electromagnetic radiation.【C3】______the energy reaches earth, some of it is absorbed by the atmosphere, including clouds. Some of it【C4】______it to the earth ' s surface, and is absorbed by land and oceans. The amount of energy absorbed affects【C5】______first of all. The energy that is not absorbed by the earth or its atmosphere is reflected back out to space in the same wavelengths【C6】______it came to earth. On average, the amount of energy【C7】______is equal to the amount of energy going out. So, we say the earth' s energy budget is【C8】______. If more energy was coming in than was going out, the earth' s temperature would【C9】______On the other hand, if too much energy is reflected, and not absorbed, we' d see a decrease in the earth' s temperatures. Of all of the sun' s energy that【C10】______the Earth, about 70% is absorbed by the land, ocean, atmosphere and clouds and about 30% is reflected back into space.

I asked the soldier what he was in______life.

Citizens in this country are now enjoying better dental health, as shown by the declining incidence of tooth .

_____ all the money people here spend eating out, restaurants'profit is still below five percent.

The public______the officials of neglecting their duty.

______, none of us wanted to take a rest.