第三部分：总结。对提出的解决方法进行简要评价(evaluation)，列举其优点，或者说明自己的喜好、选择，也可对该问题的前景做出进一步预测。

【语言积累】

1. Problems:

... is really a problem.

One of the difficulties is ... / The question is ...

It is difficult / hard to do ...

... is a problem that we have to face.

It is of great importance for us to ...

It has become the biggest concern of ...

Unless we take effective measures, it is likely that ...

2. Solutions:

We have figured out many ways to ...

Only in this way can we ...

To solve the above-mentioned problem, we must ...

Firstly ... Secondly ... Finally ...

There might be two solutions. The first one is to ...

We can solve the problem by doing ...

3. Conclusion:

In a word / To sum up ...

By doing ... you will ...

With concerted efforts we will pull through the difficulties.

With the help of ... we can manage to overcome these difficulties.

We must find out new ways to cope with the problems that would arise.

【参考范文】

If you are really planning a trip to the moon, you'd better pack something to keep you warm, and also something to keep you cool. Because the moon has no atmosphere to block some of the sun's rays or to help trap heat at night, its temperature varies greatly between day and night. That will be a great challenge to the human system.

To deal with this problem, scientists have invented spacesuits with internal heaters and cooling