Read the following article and select the best answer. Article: Humans have launched themselves into the outer space. They've landed on the moon. They've built habitable space stations that orbit the Earth. The next giant leap for mankind is to reach another planet - specifically, Mars. The problem is that it's no easy task. The planet is 586 times further away from the Earth than the moon, and it'll take around 180 to 220 days to reach Mars, depending on where each planet is in its orbit. Such long periods in space have suggested many potential health problems, including hormonal changes, skin conditions, and muscle and bone deterioration . Here's where some furry friends come in. A wide range of animals have been in space, from fruit flies and spiders to cats, and dogs. Such experiments began as far back as the late 1940s in first tests to see if living things could _ the extreme g-force of a rocket launch. Mice continue to play a very important part in space experiments, mainly because the animals make excellent test subjects. They're small, which makes them inexpensive and easy to care for. In addition, their size and short life span make it possible to do the equivalent of several human years of tests in a much shorter time. Finally, because mice are mammals, they share many common characteristics with humans in terms of genetics, biology and behavior. Astromice have hit the headlines recently, as a team of scientists led by Betty Nusgens, professor of biology at the University of Liege in Belgium, found that the mice suffered a 15 percent thinning of their skin after 91 days aboard the International Space Station (ISS). This experiment was part of a wider NASA mission called the Mice Drawer System (MDS). The Italian Space Agency developed the facility, which allows six mice to be housed, monitored, and automatically fed and watered aboard the ISS, among which three survived during the mission. The mice have participated in 20 separate experiments, to study such effects as osteoporosis , anemia and heart health. Results for the 20 experiments are coming in... Question: According to Betty Nusgens and her team, the mice aboard the ISS _ . - suffered the loss of part of their skin - all survived for the duration of the mission - were fed and watered by the astronauts - participated in 20 experiments that made great breakthroughs
suffered the loss of part of their skin

Read the following article and select the best answer. Article: At first, the earth's surface layer was made up of huge blocks of hard, solid rocks. Then slowly, the rocks broke up into smaller and smaller pieces. Finally stones, pebbles and grains of sand were formed. Many sorts of plants and animals lived and died on the surface of the earth. Their remains mixed up with the stones, pebbles and formed soil. The outmost layer of the earth is soil. There are many ways in which large pieces of rock break into smaller ones. Wind, water, heat and cold help to break up rocks. When winds blow grains of sand against a large rock for a long time, the softer layers of the rock are slowly worn away. These leave holes and cracks in the rock, which become bigger and finally the rock breaks up into smaller pieces. The moving water of streams and rivers also helps to break up rocks. As the water moves along, it carries with it small pieces of rock. These rub the larger ones. Thus, the larger rocks are worn down to smaller pieces. The heat of the sun is also helpful to breaking up rocks. When the sun shines, the rocks become very hot. If these rocks are suddenly cooled, they may crack. Ice also plays a part in making soil. Water in the cracks can turn into ice in cold weather. As this happens, it becomes bigger and the cracks become wider, and finally break into smaller pieces. Question: Which of the following speeds up the breaks of rocks most? - Hot weather. - Cold water. - Sharp changes in temperature. - More dead plants in the cracks.
Sharp changes in temperature.

Q: Read the following article and select the best answer. Article: A military train carrying soldiers has derailed south of Egypt's capital Cairo, killing at least 19 people and injuring more than 100, officials say. The train was travelling to an army camp in Cairo when it came off the tracks in the Badrashin area of Giza. It is not yet known what caused the accident. Egypt's roads and railways have a poor safety record. Last November 50 children died after a train crash into their school bus. Both the transport minister and the head of the railway authority were forced to resign as a result of the crash, which took place in November near Manfalut, 350km south of Cairo. Investigations later showed the barriers at the crossing were not closed because the signal operator had fallen asleep. Monday's incident occurred as the army train was heading from Upper Egypt into Cairo. Reports say more than 1,300 passengers were aboard the train when the accident happened shortly after midnight. The passengers wounded in the accident have been taken to hospitals, the governor of Giza said. An eyewitness told BBC Arabic that he saw two dozen dead bodies at the scene of the accident. The latest incident could increase the pressure on the government to deal with the safety of trains, the BBC's Said Shehata reports from Cairo. Four years ago, some 18 people were killed and dozens injured in an accident crash between two passenger trains in the Giza area. And in 2002, a train caught fire in Cairo, killing 373 people. Question: The accident perhaps happened at _ . - 1 p.m. - 2 p.m. - 6 a.m. - 1 a.m.
A: 1 a.m.

(Question)
Read the following article and select the best answer. Article: On the wall in my mother's bedroom there was a photo, which showed a soldier with a gun. Below the photo was the word "Speaking". "Who's that soldier called Speaking?" I asked one day. "He was Harold." She said. "He was my only brother. When the Second World War began, Harold was eighteen. I was twelve then, and my sisters were ten and nine". "Harold liked to play with us, and we often quarreled. When we quarreled, we said:We're not speaking to you. But before long we were all happy again, and then we said: I'm speaking now. Are you speaking to me?" "When the war broke out, Harold joined the army. A month later, he came to see us. He brought the gun to show us. Then he went miles away to the war. We didn't see him for three years, three long, empty years. We didn't often hear from him. But one day in May there was a loud bang on the front door..." "I ran to open it. It was Harold! He was an old Harold, a thinner Harold. He looked at me with his two green eyes and smiled. That smile was just the same as before, then he said one word: 'speaking'". "I didn't...I couldn't...answer. I just fell into his arms and he dropped his gun. He stayed with us for a month. We played all our old games again. Then he went back to the war, and never came back again. So I wrote the word on the photo." Question: Harold never came back again because _ . - he didn't want to speak to his sister any more - he died in the war - his sister had not answered him when he came back - he went far away to the war
(Answer)
he died in the war