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阅读: 鳗鱼(eel)的数量在减少以及原因
1.欧洲海域都在建大坝，这阻碍了鳗鱼回归来繁殖。
2.鳗鱼的食物鱼里面有寄生虫，导致他们感染寄生虫。
3.鳗鱼繁殖的位置很难找到，所以很难帮他们排除危险。
听力：提出了三个解决方案
1.建立带洞的大坝，鳗鱼可以穿过洞，游过去繁殖。
2.已经发现哪些鱼上面有那种寄生虫，可以把这些鱼引到别的鳗鱼接触不到的地方。
3.科学家使用电子设备已经可以确定鳗鱼的位置，保护鳗鱼。
范文
The reading passage lists three factors which have caused the decline of European eels and the lecturer gives his own solutions to solve the problem.
First, the reading points out that some dams are being built in most area of European waters, which will block eels’ immigration route to reproduce. However, the professor suggests that those dams could be designed with a series of hollowed tubes on them, thereby letting those baby eels get through and reach their feeding ground.
Second, even though the reading passage suggests that is it the parasites that cause the decline of eels, the professor proves that this claim is indefensible. He states that some ecologists have already found that the fattest eels which consume large amount of fish are most vulnerable to parasites. Thus, the spread of infection can be well controlled if we move these eels into areas where there are not so much fish for them to eat.
The passage also presents the third problem that eels always lay eggs secretly, so it is hard to prevent them from danger due to the difficulty of locating their breeding areas. However, the professor mentioned that the scientists can locate eels’ breeding grounds by installing some advanced electronic devices on them, thus they could spare no efforts to protect those eels.
独立
Some young people are free in the evenings or have days off at school, which way can bring them the most benefit?
1、to accumulate work experience by a part-time job or volunteering in a community
2、learning to play a sport
3、learning to play a musical instrument
解析：
这里提到“have days off at school”，所以建议选择第一点。因为兼职或者是志愿者活动，能够增加学生的工作经验、增强沟通协作能力，还能够让学生挣钱来实现经济独立和自由。
范文：
Holidays with bright sunshine and golden beach are always the best image in our mind, but for young people, when they are facing the choices between part-time jobs, learning to play sports or musical instruments, most of them may feel confused. As to me, I suggest to grasp the opportunities to accumulate my working experience, which have already made a mass of students great beneficiaries.
The first benefit is to make them well-prepared for future challenges in workplace. Without the experience of part-time jobs or internship, students are restricted by schooling where they just learn about the theoretical knowledge, regardless of how much these books are related to their future career. Clearly, those fresh graduates will get a strong sense of frustration. On the contrary, if experiencing this gap in advance, they are trained to combine what they have learnt from books with the social practice, which eventually makes them easy when facing the realities after graduation. Compared with the future benefits, the current pain, clearly, doesn’t matter.
Aside from good preparation, interpersonal skill is another necessity that everyone needs to attain before they entry the workplace. According to the survey conducted by Academic of Social Science, those graduates who have experienced the working environment during college time for more than 3 month are triple likely to be employed than those who have never got trains before for the reason that they clearly perform much better in cooperation and leadership. We have seen too many cases how the experienced graduates avoid communication problems and push up the teamwork efficiency. I don’t think they are born with such ability, so if students want to make themselves more outstanding over their rivals, they need to take part-time job in their free time.
When I talk with some parents about this issue, they think that since their kids have interest in that, it is reasonable to arrange sport and music time in their holiday. How much do they know about their school life? Actually, the students make full use of their pieces of time at school in such activities but, they hardly have chances to take part-time jobs, which usually need whole day or whole week. Accordingly, only during the holiday and vocation can they concentrate on their work.
In conclusion, it is significant to encourage them to take part-time jobs. Only in this way can students really experience the huge distance between school and office and, more importantly, be well-developed into individuals.(410 words)
以上的内容是2017年4月23日托福写作真题答案及解析，大家可以去研读一下托福写作评分标准，避免写作失误。