Don’t worry. We can stay here as long as our supplies      .

1. A.
   hold up
2. B.
   hold out
3. C.
   hold on
4. D.
   hold back

We can stay young forever. That is the message Dr. Shen Ziyin wants to give the world. And the Chinese doctor claims that he has found an answer to the problems of aging.

His solution is a herbal medicine to slow the process of aging.

Dr. Shen Ziyin has been trained in Western medicine. At the same time he studied traditional Chinese medicine. And, he has been working for the past forty years to put together the best of both and find a cure for aging. He has taken a hint from the ancient Chinese medicine system called “shen”.

According to Shen, it is the kidney（肾脏）which adjusts the functioning of the body as well as its aging process. It is responsible for the level of activity that the human bodies go through. Studies conducted by Dr. Shen show that herbal medicine based on the shen system slow the aging process, says a report in The Telegraph newspaper.

We notice that when people grow old, they have reduced strength, loss of hair, backache, weakness in general, and wrinkles, among others. This happens because when people grow old, their bodies produce T-cells. These T-cells contain a particular substance called Fas. Fas makes the cells in the body destruct themselves.

So the only way to slow down aging is to slow the production of T-cells in the body. This can happen if people eat low calorie food. Then the body is not active enough to produce extra T-cells. But, is going hungry all the time a good price to pay for staying young?

This is where Dr. Shen’s herbal medicine comes in. But how effective it will be, only time can tell.

1. How did Dr. Shen find the solution to the problem of aging?

2.The reason why people become old is that _________.

3.We can probably learn from the passage that _________.

短文改错（共10小题；每小题1分，满分10分）
假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。
增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。
删除：把多余的词用斜线（\）划掉。
修改：在错的词下划—横线，并在该词下面写出修改后的词。
注意：1. 每处错误及其修改均仅限一词；
2. 只允许修改10处，多者（从第11处起）不计分。
I’m writing to invite you to visit China and spending the summer vacation with me. I have made wonderful plan for it. First, we can go to Qingdao, there it is cool and mild, and have funs at the seaside. Then we were to participate in a Taiji camp in the Wudang Mountains. You are curious about Chinese Kongfu, but I believe this is a good chance to learn it. Last of all, I have also been longed to take you to the countryside. We can stay there for a few days and visit to some relatives of me. I hope this plan suits you good and I am looking forward to your coming.

The summer holidays are not far away _________ we can stay at home and read some good books.

A. where       B. when        C. why         D. in that

________ where we can stay for a week.