Read the article and select the best answer. Article: London used to be "foggy" for the same reason that cities like Beijing or Chongqing are "foggy" today. The "fog" was in fact smog, a mixture of smoke and fog. In other words, it was made by air pollution. In London, some of this pollution came from factories, but much of it came from the coal   that people burnt in their houses to keep warm during the winter. By the 1950s, London's smog problem had become so bad that the government decided to do something to clean the air. A new law was made and nobody could burn coal in any British city. Within a few years, the air became much cleaner. There were no more " _ ". Many Chinese cities now face the same sort of problem with air pollution that London faced 40 or 50 years ago. However, this problem is more difficult for Chinese cities to solve. One reason is that more of the pollution comes from the factories, rather than from coal burnt in people's houses. If these factories were closed, this would harm the economy and lots of people would lose their jobs. Another reason is that changing from coal to cleaner fuel  , like gas, is quite expensive. However, the air in many Chinese cities is becoming cleaner and cleaner, as the government and people pay more and more attention to cutting down pollution. As a result, there are fewer "pea-soupers" in Beijing than there used to be. Question: The problem of air pollution is more difficult for Chinese cities to solve because of   _   reasons. Options: A: one B: two C: three D: four
B

Read the article and select the best answer. Article: My dad was a plumber  for the public works department in our town, so from time to time he came into my school. Can you imagine sitting in class and seeing your dad walk past the door of your classroom and wave his hand at you? In junior high? One girl in our class always made fun of me because my dad was a plumber and hers was a lawyer , and she would say things like, "Ew, that's gross !" I must admit I was sometimes embarrassed by what my dad did, especially in my early teens, when the only thing I really cared about was what the other girls thought. The girl lived a few streets away from us, and one winter day---the day her elder sister was getting married---the toilet in their main upstairs bathroom broke and there was water everywhere. Her father, the lawyer called every plumber in the Yellow Page, but nobody would come and because we were having a major snowstorm. Her daughter told him that my father was a plumber, and he called, and my dad went right over---and took me with him.(Maybe he was hoping that the lawyer's daughter would be nicer to me.) My father fixed the toilet, help them clean up everything, and didn't take much time for his trouble. But as we were leaving, he told the girl, "If I ever need a lawyer, I'll be happy to call your dad." As we walked to our car, he said to me, "Do you believe he didn't know where the main shut-off valve  was? What a dumb ass!" From that point on, her dad was known in school as Lawyer Dumb Ass. When my husband and I bought our house, the first thing my dad showed him was the main shut-off valve. I have always been proud to say that I'm a plumber's daughter. Question: Why couldn't the lawyer find anybody to fix the toilet on that winter day? Options: A: He had little money B: All the plumbers were too busy to come C: There was a major snowstorm and nobody would come out D: One of his daughters was getting married and the house was in a mess
C

Read the article and select the best answer. Article: Valentine's Day  is on February 14th every year. On this day, people send valentines to their loved ones, Valentine's Day is a special time to tell how much you care about a person. Many people send candy in hearted shaped("")boxes to people they love. Flowers are also presents that people send on Valentine's Day. Valentine cards with words are often used by many people. Can you guess who gets the greatest number of Valentine cards in the United States each year? Is it mother or father, sister or brother? Is it uncle or aunt? Is it the special friend? No, it isn't! Mothers get a lot of cards, but school teachers get the most each year. Do you know who sends the most? Children do. Children send five times as many on February 14th as adults do. Question: Teachers get the most Valentines because   _  . Options: A: they send the most B: students have too much money C: so many students love their teachers D: the valentines are only made for them

C