单选题According to this passage, one of the reasons that films are often expensive to make is that ______.

单选题There are thousands of volcanoes (火山) all over the world. What makes volcanoes? What happens? The inside of the earth is very hot. Because it is very, very hot, the rock has melted like ice. It has become liquid, like water. It is always boiling, like water in a kettle. If you have seen a kettle boiling, you know that the steam and boiling water try to get out. The very hot melted rock inside the earth also tries to get out. Usually it cannot because the outside of the earth is tm thick and strong. But in some places the outside of the earth is thin and weak. Sometimes a crack appears. The hot melted rock, which we call "lava" (熔岩), pushes out through the crack and bursts through. Steam and gas shoot up into the air and the hot melted lava pours out. Big pieces of rock may be thrown high into the air. After a while the volcano becomes quiet again. The melted lava becomes hard. Later the same thing happens again and again. Each time more hot lava pours out on top of the cold lava and then becomes hard. In this way a kind of mountain is built up, with a hole down the middle. Perhaps the volcano will then be quiet. Perhaps it will start again hundreds of years later. Vesuvius is the name of a very famous volcano in Italy. It first came to life many, many years ago, It was quiet for hundreds of years. Then in the year 79 it suddenly burst. A great cloud of smoke shot up into the sky with great burning rocks. Hot lava poured down its sides. About 3,000 people were killed. This has happened again many times since that year. Sometimes no damage was caused, or only little damage. But there was serious damage in the year 1472, 1631, 1794, 1861, 1872 and 1906. You can see that a volcano can stay alive for many years. There was also serious damage in 1914 but there has not been any since that year.

单选题The history of nursing ______ the history of man.

单选题It is our company culture to make sure that employees know how all the jobs in the company work, not just their own.

单选题Children's needs are as varied as those of adults.

单选题Every Monday morning when I am in my small office, I wish I ______ in a multi-national company.

单选题What do you think of his suggestion ______ we all attend the meeting?A. whichB. whetherC. thatD. what

单选题The police asked him to describe the accident in every ______. A. fact C. detail B. material D. thing

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单选题The knowledge that property is protected by insurance makes the purchase of fire insurance a worthwhile investment for most people.

单选题Which of the following sentences best expresses the central idea of the passage?

单选题It is the best film ______ I have seen this year.A. whoseB. whichC. thatD. what

单选题He has the occasional cigarette, but ______ he smokes a pipe that is more harmful to his health. A) most C) nearly B) mostly D) almost

单选题When she arrived, she went in the wrong ______.A) directionB) placeC) locationD) course

单选题The success of this car shows the importance of good design in helping to sell the product. A) 这种汽车的优点在于它精良的设计对于打开销路十分重要。 B) 这种汽车的畅销表明精美的图案对于打开销路的重要性。 C) 这种汽车的成功之处表明图案对于打开销路功不可没。 D) 这种汽车的畅销表明精良的设计对于打开销路的重要性。

单选题The temple is still in excellent condition______ that it was built 600 years ago.

单选题It wash' t such a good TV set ______ she had promised us. A. that B. as C. which D. what

单选题The weather turned out to be very good, ______ was more than we could expect. A. what B. which C. that D. it

单选题If the earth suddenly ______ spinning, we wouldn't do anything.

单选题I would like to ______ you of the following changes we"ve made in the plans for the development of our company.