课内阅读。

　　把铁路修到拉萨去，确实不是一件简单的事。正在修建的是一条全世界海拔最高、线路最长的高原冻土铁路。风火山隧道施工，关键是控制温度。科技人员指挥突击队员，往刚刚凿开的隧道洞壁喷射混凝土。由于温度太低，混凝土无法凝固。他们拿来暖风机，给隧洞增温，洞壁的冰岩又遇热融化，造成洞壁塌滑。风火山，这座万年冰山露出了狰狞的面目，给筑路大军来了一个下马威！

　　但是，这一切难不倒我们的筑路大军。科技人员昼夜在隧洞里实地观察，发现冰岩温度变化的规律。经过反复观测、分析和实验，他们终于找到了喷射混凝土的最佳温度，制服了逞凶一时的冻土。

    In today's Internet age, the demand for online games continues to grow. Online computer game centers exist in many cities and towns throughout Asia. Facing the pressures of school and life, people turn to the virtual world, expecting a diversion from these problems. Too often, however, they can lead to problems and unhealthy addictions.

    This is most clearly seen in the example of South Korea. The country has the world's highest percentage of high-speed Internet services. It also has a high number of online game players and related problems. In 2013, a young man collapsed and died while playing online games. He had been playing almost nonstop for 86 hours at an Internet cafe. Another young man killed his sister after becoming confused between the online world and real life. A 12-year-old boy stole US $ 16,000 from his father and ran away from home. He did this to continue his obsession with an online game. Such problems, however, don't just happen in South Korea. They are spreading to other parts of Asia, as well.

    What kinds of people develop online game addiction? What does the problem look like? Dr. SueHuei Chen, a clinical psychologist, researches Internet addiction. She discovered some signs of at-risk individuals such as lack friendships and good social skills. Those problem individuals feel it so compulsive to play online games that they could sacrifice things such as school or family. They feel the need to spend more and more time online. And they become upset if anyone tries to limit their online game playing.

    How many problem game players are there? In mainland China, the potential number of problem online gamers is alarming. In 2014, the China Daily reported that China had 13.8 million online game players. Furthermore, it stated that 80 percent of these were under 25 and had signs of addiction. Such numbers point toward a growing problem among Chinese youth.

Make sure to keep control over your online game playing. If you don't control it, it can get control of you.

通读下面短文, 掌握其大意, 然后在每小题所给的四个选项中, 选出一个最佳答案, 并将答题卡上对应的选项涂黑。

    My parents are busy with their work every day. You can't see there is love 1 them. They don't act in the romantic（浪漫的）2that I read in books or I see on TV.

    One day, while Mom was sewing(缝) a quilt，I 3 beside her. “Mom, I have a question,” I said after a while.

    “What?” she asked.

    “Is there love between you and Dad?” I asked her in a very low voice.

    She stopped sewing and 4 her head. Then she bowed her head and went on sewing.

    I thought I had hurt her. At last I heard my mother say， “Susan, look at this thread（线）. Sometimes it appears, but most of it disappears in the quilt. It makes the quilt5. If life is a quilt, then love should be a thread. It can hardly be seen, but it's 6 there.”

    I couldn't understand her 7 the next spring. My father suddenly got sick. Mom had to stay with him in the hospital for a month.

    After they 8, my mother helped my father walk slowly down the country road every day. My father had never been so gentle.

    “Dad, how are you 9 now?” I asked him one day. “Susan, don't worry about me,” he said. “I just like walking with your Mom.”

     Once I thought 10 meant flowers, gifts and sweet kisses. But from this experience, I understand that it is just a thread in the quilt of our life . It is inside, making life strong and warm.