1. My mother is a teacher and she has t__________ English in this school for 20 years.

2.The n__________ side of the building gets less sun than the south.

3.If the sky is c__________, there’s no rain or cloud and you can see very far.

4. Bella can speak two l__________, French and Chinese.

5.S__________ can be used for making food and drinks sweet.

6.Susan was born in a v__________ but she works in the city now.

7. Jack is the tallest a__________ the three students.

8.Please don’t make a n__________ because the baby is sleeping now.

9.It is reported that two men were killed in a car a__________ early this morning.

10. My doctor advised me to take the medicine t__________ a day, in the morning and evening.

When Susan told me that she was terribly ill and probably would die. I cried. I didn’t understand why this happened to my best friend. Then Susan   35  me a red ribbon(丝带) without saying anything.
A month later, Susan was at a hospital about two hours away from where we lived. I asked my dad to take me to see her. I wanted to give my best friend a   36 . So I took out the ribbon and cut it into two pieces with scissors(剪刀). I put one in my pocket and the other in an envelope(信封), along with a letter explaining it to her. I told her to keep her   37  beside her bed, and I would keep mine near me, too. Then I went to the hospital one Friday afternoon, wondering (想知道) if the ribbon would   38  anything to her. I walked into the room and ran over to give her a big hug. Then I gave her a teddy bear and the envelope. We talked for a while and then she started looking   39 , so I asked her to get some rest and left the hospital. All the way home I   40 the ribbon close to me.
For the next four months, the ribbon was with me  41 I went: school, home, shopping, and at friends’ houses. Where I went, it went. It was something to remind(提醒)me that I had a friend who would   42  home very soon. Susan said that she wore her ribbon   43  her arm all the time and she always had it close to her when she was being tested and treated.
Finally, Susan came home! I was so happy. That night, I looked at the ribbon which was still with me. I had a feeling it would never   44 , that I would remember what had happened during the time she had been ill.

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Do you know something about tree rings (年轮)? Do you know they can tell us what the weather was l__1___, sometimes even hundreds of years ago?

A tree will grow well in a climate with lots of sunshine and rainfall. And l__2__ sunshine or rainfall will limit (限制) the growth of a tree. We can see the change of climate by studying the tree rings. For e___3___, to find out the weather of ten years ago, count the rings of a tree from o___4___ to the inside. If the t___5___ ring is far from the eleventh ring, then we are sure that it was sunny and rainy most of that year. If it is near to the eleventh ring, then the climate that year was bad.

Tree rings are i___6___ not only for studying the history of weather but also for studying the history of man. Long long ago there lived a lot of people at a place in New Mexico. But now you can find only s___7___ there—no trees and no people. What h____8___?

A scientist studied the rings of d___9__ trees there. He found that the people had to leave b__10___ they had cut down all trees to make fires and buildings. As all trees had gone, the people there had to move.