单选题It was very kind of her to do the cleaning-up, but she didn’t have to do it.A．如果她把这些东西都打扫了就太好了，但是她没打扫。B．她真好，把这些东西都打扫了，但是她原本没有必要打扫。C．如果她把这些东西都打扫了就太好了，但是她不是必须要打扫。D．她真好，把这些东西都打扫了，但是已经没有必要了。

单选题I ______ to see you but I was occupied in designing a new device.

单选题After you have carefully examined the car's performance at the shop, you have to ______.

单选题I don't feel like ______ now. A. to dance B. dancing C. dance D. danced

单选题Everyone else was killed in the earthquake; I was the only one to ______.

单选题We buried (埋葬) Donald Brown in May. He was murdered (谋杀) by four men who wanted to rob the supermarket manager he was protecting. Patrolman (巡警) Brown was 61 years old. In just six months he and his wife had planned to retire to Florida. Now there will be no retirement in the sun, and she is alone. Donald Brown was the second police officer to die since I became Police Commissioner of Boston in 1972. The first was Detective John Schroeder, shot in a pawnshop (当铺) robbery last November. John Schroeder was the brother of Walter Schroeder, who was killed in a bank robbery in 1970. Their names are together on the honor roll (光荣榜) in Police Headquarters. At least two of these police officers were shot by a handgun (手枪), the kind almost anyone can buy nearly everywhere for a few dollars. Ownership of handguns has become so widespread that this weapon is no longer merely the instrument of crime; it is now a cause of violent (暴力) crime. Of the eleven Boston police officers killed since 1962, seven were killed with handguns; of the eighteen wounded by guns since 1962, seventeen were shot with handguns.

单选题A.Ishouldn'tbelatejustnow.B.Iwasnotlate.C.Iwaslatefortheconcert.D.Iwasontime.

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单选题Nobody but Jack and Smith ______ in the office yesterday.A) had beenB) wasC) wereD) is

单选题Strange things happen to time when you travel, because the earth is divided into twenty-four time zones, and one hour separate. You can have days with more or fewer than twenty-four hours, and weeks with more or fewer than seven days. If you make a five-day trip across the Atlantic Ocean, your ship enters a different time zone every day. As you enter each zone, the time changes one hour. Traveling west, you set your clock back; traveling east, you set it ahead. Each day of your trip has either twenty-five or twenty-three hours. If you travel by ship across the Pacific, yon cross the international date line. By agreement, this is the point where a new day begins. When you cross the line, you change your calendar one full day, backward or forward. Traveling east, today becomes yesterday; traveling west, it is tomorrow.

单选题Why don't birds get lost on their long flights from one place to another? Scientists have puzzled over this question for a long time. Now they're starting to fill in the blanks. Not long ago, experiments showed that birds use the sun to guide them during daylight hours. How do birds fly at night? Tests with artificial stars have proved that certain night-flying birds are able to follow the stars in their long-distance flights. A dove had spent its lifetime in a cage and had never flown under a natural sky. But it had an inborn ability to use the stars for guidance. The bird's cage was placed under an artificial star-filled sky. The bird tried to fly in the same direction as that taken by his outdoor cousins. Any change in the position of the artificial stars caused a change in the direction of his flight. But the stars are apparently their main means of navigation. When the stars are hidden by clouds, they apparently find their way by such landmarks as river courses, mountain ranges, coast lines. But when it's too dark to see these things, the doves circle helplessly, unable to find their way.

单选题______ is reported in the newspapers that the talks between the two companies have not made any progress.

单选题______swim to that little island in the middle of the lake and back again?

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单选题The beautiful flowers ______ a sweet smell.

单选题All I have is yours. You may take ______ you like. A. which B. that C. whatever D. no matter what

单选题______ one you choose, I am sure you will enjoy it.

单选题The house is ______ for us to ______.