Parts of Africa are covered by a dark cloud. But this is no rain cloud. It is a living cloud made of billions of locusts and they are eating everything in their path. And now in order to fight against this disaster, a radio station in Senegal, West Africa, is offering listeners 5 kilograms of rice if they can catch and kill 50 kilograms of locusts. "We think this idea will get more people to take part in the fight against the locusts," said Abdoulaye Ba, from Sud-Fm, a radio station in one of Senegal's worst affected area. This is West Africa's biggest locust disaster in 15 years. Now it is moving east and it leads to the loss of crops. When they move, they have babies, so their number is getting bigger. and will soon threaten Sudan in the northeast of Africa. Some say it may reach Asia. Experts say many people in the areas will go hungry because of this disaster. What's worse, governments in the areas don't have enough things to fight the locusts. Although leaders of 12 countries have agreed on a plan, it is not enough. 'We are now treating 6,000 hectares per day with pesticide , but we need to treat 20,000 hectares per day in order to have any hope of controlling this disaster,' said Mohamed Abdallahi Ould Babah, leader of locust control in Mauritania. What does"dark cloud"mean in the first paragraph, the writer of the article _ . A) wanted to show the size and speed of the coming locusts B) wanted to show the great damage that locusts may cause C) wanted that locusts could cover the continent like rain clouds D) both A and B
D

Now, it may be difficult to predict the future, but many people believe that we will live on Mars by the year 2100. Our own planet, Earth, is becoming more and more crowed and polluted. Well, what problems will we need to solve before we prepare to go to Mars? First of all, transport should be much better. At present, humans need to spend months going to Mars by spaceship. However, by 2100, spaceship can travel at half the speed of light. It might take us two or three days to get there! Secondly, humans need food, water and air to live. Scientists should develop plants that can be grown on Mars. These plants will produce the food, water and air that we need. However, there is no answer for all the problems now. There is also a problem for us to live on Mars. Mars attracts us much less than the Earth does. This will be dangerous because we could easily jump too high and fly slowly away into space there. We will have to wear special shoes to make ourselves heavier. In some ways, life on Mars may not be better than that on the earth today. Food will not be the same --meals will probably be in the form of pills and will not be as delicious as they are today. Also, space travel will probably make many people feel very uncomfortable. Which looks like life on Mars according to the passage? A) We can wear the shoes that we like to wear. B) We can drink easily and conveniently. C) We can walk faster than on the earth. D) We can boil food to eat.
C

Darling Kelli, I'm so sorry I will not get to see you grow up as I so want to. Please don't blame people or the world for this. A lot of life is simply luck and mine is running out. I wish I had the words to make you feel better. I wish you didn't have to see me in pain as you often do now. I wish so many things were different but they are not. But while your old dad is still around, I thought I'd try to give you some life advice in one go. I hope it gives you some comfort. I hope cancer never returns so that your life is long, fulfilled and happy. Everyone will say it's of great importance to work hard at school. I hope you'll always do your best. I did well at school but did it do me much good in life? Not really. Schoolwork is important, but make sure you have fun too. You and your mom will argue at times, especially when you're a teenager. Please remember she loves you and wants the best for you. Give Mommy a hug when she is feeling sad. When you're a teenager you might think your friends are right and your mom is wrong. But she has to make hard decisions for you. Treat her well. You'll have boyfriends when you're older, so here's some advice. It's very hard to describe how it feels to really be in love. You might remember seeing your mom and I laughing together and cuddling on the sofa, and once the love hearts and flowers fade that's what real love looks like. Have fun finding it. Most important of all: Your laugh takes over your whole body. I hope you never lose that. There is no point in asking you not to be sad when I go. I know you will be, princess. And I wish I could be there to hug you until you smile again. And finally, thank you for being you, Kelli. Enjoy your life. Don't rush through it. All my love, always, goes to you, princess. The father feels sorry because _ . A) he is badly ill and in pain B) he argues with his wife at times C) he won't get to see his daughter grow up D) his daughter is not willing to take his advice
C