单选题Scientists have been struggling to find out the reason behind blushing （脸红）。Why would humans evolve（进化） a 21__________ that puts us at a social disadvantage by 22__________ us to reveal that we have c

单选题The beam that is ______ by a laser differs in several ways from the light that comes out of a flashlight.

单选题 It is no use ______ me not to worry about his injury.

单选题You are greeting an acquaintance with"Hello"to perform the____function of language.

单选题In this land of plenty, we must be ashamed of the ______ and suffering that still exists in the slum areas.

单选题Husband: Can I wait at the coffee bar? I feel ill at ease when you are picking things out. Wife: ______. I don't want to shop alone. You can always give me advice, or enjoy looking at beautiful women. Husband: Don't talk nonsense.

单选题The ghostly presence was just a(n) ______ sensation of some people.

单选题We need a chairman ______.

单选题As an amateur, you' ll have to ______ first.

单选题There Pictures from outer space now show us how much land has changed on earth. These images are taken by Landsat 7, a government satellite. The satellites have been used for 27 years. They reveal the clear-cutting of forests in the northwestern part of the United States. Pictures show the loss of rain forests in South America. NASA's Darrel Williams speaks about the Landsat 7 Project. He said that an eruption caused trees to burn up in a large forest. Fifteen years later, pinkish images from space show that the trees and plant life are growing again. Williams says that clear-cut areas easily show up in the pictures. He wants Americans to look at how much land is being cleared of forests in our country. Satellites have provided other information about changes on earth. In the past ten years, more than four miles have shrunk from glaciers in Alaska. Landsat 7 received these computer images of Glacier Bay in Alaska. Hurricanes Floyd and Irene have damaged the coastline in North Carolina. Runoff from farms and silt have gone into the ocean according to satellite images. Loss of trees and forests have caused hotter summers in southern cities such as Atlanta, Georgia. The Landsat 7 images are like pictures in a photo album. Instead of pictures of the family, the album shows changes around the globe in the past 25 years. A new satellite, Terra, is going to be launched by NASA soon. It will be more advanced than Landsat 7 and will take important global pictures. Ocean temperatures and energy loss will be provided by Terra daily.

单选题It was a very hot day in the middle of summer, and there were no trees along the street. Mr. Read (41) his shop at half past five, and went out into the street and began walking to the bus. He was a very (42) man. The sun shone straight down the street, and in a few minutes Mr. Read (43) very hot. A small boy came out of another (44) in the street and followed Mr. Read. He stayed very (45) him all the time, and he kicked Mr. Read's (46) several times. Mr. Read looked at him angrily each time. After the fourth time, Mr. Read stopped, turned (47) and said to the small boy, "What are you doing? (48) following me like that! You're going to hurt my feet." "I'm (49) , but don't stop me, please!" the small boy said. "It's very hot today, and there isn't (50) shade anywhere else in the street!/

单选题The plane succeeded in carrying the boy on board with ______ in the air.

单选题 Yamagata-born Ken Okuyama, well known in automobile design circles, was brought into style the company's super glossy new Cruise Train. Holding a maximum of 34 passengers, the Cruise Train will have 10 carriages made up of five suites, one deluxe suite, two glass-walled observation cars, a dining car and lounge. Okuyama has worked as a chief designer for General Motors, a senior designer for Porsche AG and design director for Pininfarina, the company behind the Ferrari Enzo and Maserati Quattroporte. According to his company, Ken Okuyama Design, he wanted to create a train that would allow passengers 'to appreciate the flow of the time and space,' while enjoying Japan's landscapes and culture throughout the journey. One of the more unique features is the observation carriage at the front of the train, which allows passengers to see onto the tracks ahead. The other observation car is at the end of the train. JR Rail says the train will be fitted with furniture that conveys the nobility of traditional Japanese culture. The Lounge, for instance, is wrapped in exquisite curves and features decoration inspired by trees. All suites will have a private bathroom with a shower and toilet, but the top sleeping space is the split level deluxe suite, which sleeps four. On the bottom are two double beds, on the top a traditional Japanese dining area, with seats on the floor. The train will be able to run on both electric and non-electric rails. JR East's upcoming Cruise Train won't be the first Japanese train to take the super-luxury route. JR Kyushu's Seven Stars train, which features Japanese and Western design elements, hit the tracks in the fall of 2013. This one only travels through the island of Kyushu and has 14 luxury guest rooms, two deluxe suites, three presidential suites, a lounge car, dining car and bar. Guests can choose either the two-or three-night experience. The name 'Seven Stars' represents the seven districts of Kyushu, the seven carriages of the train and the seven main tourist attractions of the island (nature, food, hot springs, history / culture, spiritual sites, local hospitality and sightseeing). Those who want to take a Seven Stars journey need to apply online. Prices start from ～180,000 ($1,765) per person for the two-night trip. No first come first serve here. The company says that in the event that applications exceed available places, a lottery will be conducted to select participants.

单选题The government has lost a great deal of ______ because of the large increase in food price.

单选题Attitudes on the two sides in the Revolutionary War precluded the possibility of a peaceful solution.

单选题Black FridayEveryone likes to shop for gifts for the holiday season, but few people know the history of holiday shopping. While people have heard of Black Friday; most do not know its origins. Black F

单选题The school authority ______ against students' smoking both in the classrooms and at home. A. resolved B. determined C. banned D. prohibited

单选题Mary, along with her parents, ______ to Paris. A. have moved B. has moved C. are moving D. have been moving

单选题This box is______ that one.

单选题I don' t think physics (is) hard (to learn). (However), my physics (are) very poor.