问答题

Directions:
Study the following charts carefully and write an essay in which you should
1) describe the chart briefly,
2) interpret the causes of it, and
3) give your comment on the tendency.
Your composition should be more than 150 words. You should write your composition neatly on ANSWER SHEET 2.

【参考答案】

As can be seen from the above charts, some important changes......

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