(Q).
Solar   water heaters can use energy from the sun to heat water. They are used around the world. The solar water heater is based on a design developed some years ago in Afghanistan. Since then, it has been built and used in many countries. It can heat seventy liters   of water to 60degC. It can do this between sunrise and noon on a clear day with an average temperature of 32degC. There are two parts of the solar water heater. One part, the collector, is made of a metal plate painted black. This metal surface, placed in contact with the water, will heat the water. Black-painted surfaces that receive the sun's heat become hotter than those of any other color1. Metal plates that have raised parts on the surface work better than those without them. Once the water is heated, it is kept hot with special material, which allows the water to stay warm for a long time. The second part of the solar water heater holds the water for the system. This water tank   can hold about one hundred liters of water. Two rubber pipes are connected to the water tank. One pipe lets water go into the system. The other lets water go out. When the water heater is working correctly, water will flow from the tank to the collector and back again. You can use the hot water at the top of the tank for washing and cleaning. This solar water heater is easy to build and operate. It will last about two years before the rubber pipes need to be replaced. The color1 of the collector is black because   _  . A) it is the cheapest color1 paint B) it can be found easily in daily life C) it can take in more energy than other color1s D) it is good for protecting the metal surface
(A).
C


(Q).
Scottish pupils recently were part of a new scheme that allowed them to take their exams online. Those examinations provided a glimpse of the future in May when 120 _ in 10 centers in Scotland sat in front of computers to take a multiple-choice online exam. Although candidates were using a computer mouse instead of a pen, in all other ways the exam was the same as normal. Exam rooms were set out to ensure that only the candidates and the teachers were able to see the individual screens. The online answers were sent directly to a safe area. According to the students at St Ninian's in East Renfrewshire who took an online French exam, it was definitely the most motivated they had ever felt when taking an exam. "I could go as fast as I wanted to, rather than as slow as everyone else wanted to," said one. "It was better than looking back and forth between the questions," said another. One pupil even described it as fun. Their head teacher, Dorothy Graham, was not so surprised, "They are so used to doing things on computers that it seems natural for them. The boys liked it because they didn't have to worry about how neat their work was." The only things that worried her were power cuts and systems' crashing. It's thought that online exams could be the norm   in about five years. However, last year there were warnings about computerizing exams in England and Wales. It's thought that it could be unfair to some students if they come from homes without access to a computer. We can learn from the passage that it is mainly about   _  . A) computers in modern schools B) taking exams online C) testing computers in classroom D) taking a multiple-choice exam
(A).
B


(Q).
You want to have fun and adventure and so you decide to travel somewhere to do it. Sounds like a simple enough thing. And basically it is. But what is adventure? That is the key here and the answer can be different for different people. For those who love sports, adventure travel can have a whole different meaning than for those who like history. The physical travel types that you can find include such adventure travel as white water rafting  , kayaking or climbing and hiking to some mountains somewhere. To the hiker, backpacking across Ireland might be their adventure. For this type of person, adventure travel almost always includes something physical. Often the goal is to push their body's limits and test their individual endurance  . For those who less want to climb mountains, adventure travel might mean traveling to Nepal and taking in the local festivals. Wine tasting in Italy is also vacation adventure for the more relaxed traveler who enjoys peace and comfort. Anything that is opposite to the normal scope   of the traveler's lifestyle defines   adventure. Adventure travel is not necessarily a one-size-fits-all type of vacation. Adventure depends on the person's physical limits, how much money the person has and what the person enjoys doing. Going _ the normal is adventurous for many. If your life is quite busy, then sitting on a beach in the moonlight with your family might be adventure for you. The point is not what you do but that you have a good time and that it is an adventure for YOU -- not for the person next to you. Do not sit home this year when vacation time rolls around. Go beyond your normal routine and try something new. If you usually spend your vacation sun-bathing on a beach, try hiking, instead, through the mountains. Look around you, think beyond your comfort zone and head out on an adventure vacation. To have an adventure travel, the most important is   _  . A) whether you enjoy yourself B) whether you try something dangerous C) where you go for the traveling D) what you do in the traveling
(A).

A