五、根据课本第 36 页 Section B 1b 的语篇内容,完成下面的表格。
| Topic | Question | Answer |
| Importance of bees | How many flowers do bees visit on one trip? | 1. |
| | What does bees' pollination help? | 2. |
| | Without bees' work, about what percentage of the plants in the world cannot grow? | 3. |
| Interesting facts about bees | Why do bees create honeycombs? | 4. |
| | How does a bee tell the others where and how far away the food is? | 5. |
| Problems of bees | What is happening to the number of bees? | 6. |
| | How do scientists feel about the problem? | 7. |
| | What does the writer ask us to think about? | 8. |

1. 50 to 100 flowers. 2. It helps plants grow. 3. About 80 percent. 4. To store honey. 5. By dancing. 6.The number of bees is dropping. 7. They are worried. 8. What we can do to protect bees.

六、阅读短文,从方框中选择适当的句子补全短文。
"Hello!" (Hello... Hello...) Have you ever heard an echo (回声)? Do you find it interesting? 1. ______
Some animals use echoes to help themselves find their ways. Bats (蝙蝠), for example, use echoes to do what other animals do with their eyes. 2. ______ When the cries hit an object (物体), echoes appear. The bats listen to the echoes to find exactly where the object is. Humans can do something similar. Blind people may become sensitive (敏感的) to sounds. 3. ______ The blind can feel these differences, and then they use the information to locate (定位) walls and other objects.
Scientists use echoes to explore our planet. 4. ______ Different objects send back different echoes. By studying the echoes, scientists can tell what lies below. This can help them find oil and coal.
5. ______ The ultrasonic waves (超声波) can easily get into the human body. The waves are used to create pictures of bones and organs (器官). These pictures can help doctors find problems.
A. Echoes have medical uses as well.
B. Sounds arrive at each ear at different times.
C. They send sound waves deep into the earth.
D. Bats send out loud cries as they fly in the dark.
E. In fact, besides being interesting, it is very useful.
1.
2.
3.
4.
5.

1. E
2. D
3. B
4. C
5. A

1. 第一个空：前文提到“Have you ever heard an echo (回声)? Do you find it interesting?”，后文讲回声的实际用途，应选表示“事实上，除了有趣，它还非常有用”的选项，故填E。
2. 第二个空：前文提到蝙蝠利用回声，后文提到“当叫声碰到物体时，回声出现”，应选描述蝙蝠发出声音的选项，故填D。
3. 第三个空：前文提到盲人对声音敏感，后文提到“盲人能感觉到这些差异”，应选描述声音到达双耳时间不同的选项，故填B。
4. 第四个空：前文提到科学家利用回声探索地球，后文提到不同物体返回不同回声，应选描述科学家发送声波进入地球的选项，故填C。
5. 第五个空：后文提到超声波在医学上的应用，应选描述回声在医学上用途的选项，故填A。