A young man worked very hard on his lessons. He was too busy to have a rest. One day he found that he couldn't fall asleep at night. As he became ill, he couldn't go to sleep. When he went to bed, he closed his eyes and tried to sleep. But he always failed.
After a few days he decided to see a doctor.
"I just can't go to sleep at night. What should I do?" he asked.
"I have a suggestion," said the doctor. "You can try to count numbers. When you count to one thousand, you will be asleep. I am sure of it. "
The next day the man returned to the doctor's office.
"Well," said the doctor. "How are you today? Did you try my suggestion?"
The man still looked tired. "Yes," he said. "I tried to count one, two, three.. , up to one thousand. But when I counted to five hundred and sixty--nine, I began to feel sleepy. I had to get up and drink some tea so that I could go on counting up to one thousand. But then I still couldn't fall asleep. "
【小题1】Why couldn't the young man go to sleep at night?

Traveling is one of the most important activities and people have been interested in it for many years. Modern traffic develops fast, so traveling to different places has become much easier than before.

     Staying healthy while traveling can make your trip happier. But do you know how to keep healthy during a trip? The following information may be useful for you.

Before leaving:

l         Wear comfortable shoes, a hat and sunglasses.

l         Take some necessary medicine with you. They can be used when you get sick or have other problems.

l         If you do lots of sports like walking or climbing on your trip, you should do some exercise for weeks or months before you leave.

While traveling:

l         Be sure not to eat dirty food or bad fruit.

l         Have enough time to take a rest during your trip.

l         Tap water（自来水） is not safe, so drink bottled water and always clean the cover on the bottle.

1. You should ______ before you leave your home for a trip.

A．get some medicine                                    B．clean the cover

C．drink much water                                     D．wear warm clothes

2. You had better not _______ while you are having a trip.

A．wear sunglasses    B．be too tired          C．wear a hat            D．take a rest

3. If you ________ while traveling, your trip will be happier.

A．walk fast                                                B．eat too much

C．keep healthy                                           D．climb the mountain