Task 1:是否同意让graduate students去教一些基础课程，还是不要教课，只做教授的助手？

参考答案：I think it is a great chance for graduate students to teach some fundamental classes in university.

There are many classes in the department where professors need help in areas such aslecture, discussion. Undergraduates in smaller classes taught by graduate students will have more personal interactions with people actively working in the field.

Also, teaching will build their self-confidence in giving professional presentations at conferences, committee meetings, and qualifying and exit exams. Even if they donot remain an academic for life, many organizations will expect them to give presentations.

综合写作：控制生物的数量。

话题分类：生物类

阅读：三个方法减少澳大利亚鲤鱼的数量

1. 亚洲通过商业贸易来减少鲤鱼的数量

2. 给玉米等鲤鱼的食物下毒。不会伤害本土鱼

3. 科学家通过基因工程改变鲤鱼的基因，让他们只繁殖male

听力：反驳

1. 澳洲的鲤鱼不好吃，由于蛋白质丰富，只能做动物饲料，但是动物饲料行业已经饱和，所以商业方法不可行

2. 鲤鱼能够检查到毒素，有毒的饲料不会被吃，而是被留在水里，毒素有可能泄露从而毒害本土鱼

3. 基因工程可以改变一些鱼，但是水里还有健康的自然鱼，它们可以继续繁殖。洪水把一些宠物鲤鱼冲到河里，保证了健康鱼的繁殖。

解题思路：听力内容驳斥了阅读的三点好处。

参考范文：

While the writer proposes three methods to control the amount of carp in Australia, the lecturer questions the strategies and states the reasons.

The author citesthe example of Asian corps to support the approach related to commerce, but ignores that Australian carp is not as delicious as the Asian one. According to the lecture, carp in Australia being rich in protein can only be produced into feedstuffs. However, there is no space in the relevant market, and therefore this method is unconvincing.

 Another method mentioned in the written article is to poison the food for carp like corns. The professor, on the other hand, objects to it because carp is able to detect toxinsand avoid toxic food. Thus, poison leaked would harm native fish.

The writer also suggests to engineer carp DNA to achieve the population control. The professor argues against the method by mentioning that the GM genes would stop working in the wild population. Besides, floods may bring some carp which is treated as pets into rivers, and the new population ensures the healthy reproduction of the species.