根据以上内容，回答16~20题。

"Trying to get Americans to eat a healthy diet is a frustrating business" can be easily proved by the fact that

[A] public-health campaigns cannot compete with tempting flavors.

[B] snack-food and fast-food industries are flourishing in the US.

[C] most food in America are profoundly rich in fat and sugar.

[D] fat people account for a large proportion of American population.

The chart below shows the changes of consumer index in a certain country from 1930 to 1980. Study the chart carefully and write an essay of 160-200 words to

1 ) describe the trend of consumption as revealed in the chart,

2 ) explain the possible reason underlining this trend, and

3) give your comment.

You should write neatly on Answer Sheet 2. (20 points)

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Zhang Li is a classmate of yours. He suffered from a serious illness. Write a letter to

1 ) call on the students to help Zhang Li and

2 ) tell them how to help Zhang Li.

You should write about 100 words on ANSWER SHEET 2. Do not sign your own name at the end of the letter. Use "Li Ming" instead. You don' t have to write the address. ( 10 points)

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根据以上内容，回答1~5题。

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