What do you do if you are hit in the mouth and one of your teeth is knocked out? A dentist may be able to put the tooth back in for you, but you have to get to the dentist first.In the meantime, you have to store the tooth so that it will stay healthy. The simplest thing to do is put the tooth back into your mouth, or you could put it in milk.Frank Courts, a dentist at the University of Florida, worked with other researchers to find the safest way of keeping knocked-out teeth.He tried putting teeth into milk, into water, and into cell-culture medium .He also tried, just drying the teeth in the open air.He used teeth that had to be removed from people's mouths for various reasons.The teeth were put into one of the solutions or stored in the air for one hour.Then cells from the root of the teeth were scraped-off the teeth.Dr.Courts and the others then studied how healthy these cells were. The cell-culture medium worked best to keep a knocked-out tooth healthy outside the mouth.However, few people keep cell-culture medium handy at home or in school. The next best thing was milk.But Dr.Courts said that the best thing of all was to wash the tooth and put it right back into its socket in the mouth.For some people, though, this is just too painful or upsetting.So milk will do, until you get your tooth (and your mouth)to a dentist. This passage is mainly about_. A) how a dentist can save a knocked-out tooth B) how to keep a knocked-out tooth healthy C) how Dr.Courts and other researchers made their experiments D) how to put a knocked-out tooth back into its socket
B


When the musical sound rings you, you immediately reach for your pocket ready to have a chat. But although you probably use it all the time, have you ever thought about the manners related to talking on the phone? If you haven't, here are some tips to guide you. *Always give the person you are calling plenty of time to get to the phone before you hang up. If the person who answers is not the one you want, give your name and ask if you may speak to the person you want. *Think about the time you call people. Try not to call too early in the morning (before about 9:00) or too late at night (after about 9:30). Also try not to call at mealtimes. *If you go by plane to visit your relatives at Christmas, remember to follow airline instructions. Cell phone must be turned off as soon as the plane doors are closed and remain so until the doors open again on arrival. *When you're face to face with someone, do not talk on the phone. It is rude to be on the phone when a waiter is trying to take your order in a restaurant, or when you are returning the shoes you have just been trying on in a shop. Finish any face-to-face business before taking a call. Continuing to use the phone while nodding to the person in front of you is quite impolite. *When in a restaurant with your friends, keep phone conversations short. Make a call only if it is important. Practice speaking in a low voice. If no one turns to your way, _ . *If you go to a theatre, a concert or a cinema, consider the other people around you. Check that your phone is "off" before you enter. If you are expecting a very important call, put your phone on "vibrate"  and run for the exit as soon as you feel it. If you forget both "off" and "vibrate" and your phone rings, don't answer it, turn it off straight away. From the tips given above, we can decide the writer must agree with the opinion that   _  . A) like the saying "clothes make a man", nowadays cell phones make a man B) as the old saying goes, money talks, nowadays cell phones talk C) the way we use the cell phones tells what we are like D) we are what cell phones we use
C


Q: There used to be a term that was used to describe someone who drove their vehicles down the highway while staring at the scenery. These drivers just drove slowly, taking their own sweet time, as if they had nothing to do and no place in particular to go. Thus, the expression, " _ ", was born. Consequently, a Sunday driver wasn't necessarily someone who was driving on a Sunday. A person could be a Sunday driver any day of the week. _ . The expression probably came about because there was a time when people would often decide to go for a relaxing drive on Sunday afternoons. A Sunday drive was a common occurrence years ago and especially on a nice warm sunny day. There were no stores open on Sunday because of the "blue laws", so you needed to be sure and fill up the gas tank and make any other needed purchases before Sunday arrived. Some of the states had strict blue laws that even prohibited some activities on Sunday. However, there is still a lot to be said for the slow, gentle life that once existed. It was a time when very few people worked on Sunday except for those professions vital to our well-being such as those in the medical profession. It was a day "set apart" that was used to rest, visit with neighbors and friends, or maybe go to grandma's house for supper. Today there are many who return to work and children who go back to school overly tired on Monday due to a lack of rest. Perhaps there would be less stress related illnesses if we really kept Sunday as a day of rest. According to the passage, "Sunday driver" refers to the person who   _  . A) drives his vehicle on Sundays B) drives for fun and relaxation C) enjoys a weekend break D) makes a Sunday purchase
A: B


*Question*
Bali is a tiny island that is part of Indonesia  today. It is a pretty island that has many mountains and a pleasant climate. For a long time, Bali was cut off from much of the world. The people of Bali were happy and had a peaceful life. They were not allowed to fight. At one time there had been terrible wars on Bali. Then the people decided it was wrong to fight or have wars. They made rules to keep apart those people who wanted to fight. Bali was divided into seven small kingdoms. The land around each kingdom was kept empty, and no one lived there. Since the kingdoms did not share the same borders , the people could not fight about them. On Bali, even children were not allowed to fight. If two children started a fight over a toy, someone separated them. When two boys argued, they would agree not to speak to each other. Sometimes they did not talk together for months; this gave the boys a chance to forget their anger. Families who were angry with each other also promised not to speak. Their promise was written down, and the whole village knew about it. If they broke their promise, they had to offer gifts to their gods. Bali is an island belonging to    _   . A) Europe B) Africa C) Asia D) America
**Answer**

C