12. Martine is friendly, clever and has a lot of humor.
13. I watched the children singing and laughing with great interest.
14. Some of the students working in Professor Smith’s laboratory last semester.
15. He is talking excitedly to the children. As if he knew everything in the world.
III. 标出主题句（15 points, 5 points each）
16. Choose the best topic sentence from the group below.
A. Skydivers(跳伞运动员) have found a way to fly without a machine.
B. The fall is so smooth that skydivers don’t feel like they’re moving at all.
C. Skydivers jump from an airplane and fall at the rate of 120 miles an hour.
D. For many years people have wished they could fly through the air like birds.
Answer
17．Read the following paragraph and underline the topic sentence.
Wilma was very sick when she was four. She could not move her left leg. Her mother rubbed her leg for a long time every night. When Wilma was six she would hop a little. Wilma worked hard to learn to walk and run. When she went to high school she ran on the girls’ track team and won. Then she ran track in college. Wilma was so good that she went to the Olympics and won two gold medals. The little girl who could not walk grew up to be a winner through hard work.
18.Read the following paragraph carefully and select the best topic sentence from the four possible answers that follow the paragraph.
Topic sentence
On a cloudy day the clouds hide the sun, but the sun is always there. The clouds of thoughts, worries and desires cover and hide our happiness. We have to get rid of them in order to experience it. Then the happiness that lies in the soul and is always there will give us warmth. Also, happiness does not depend on circumstances. Objects and events are not its causes. It is dependent only on one thing: the peace in our mind. This means that in order to experience happiness intentionally, we have to make our mind silent, calm and relaxed. This happiness I am talking about is constant and existing for ever. It is our nature; only our thoughts stand in our way of experiencing it. Drive away the thoughts and you are happy.
A. Happiness always gives us warmth.
B. Happiness can be found everywhere.
C. Happiness is not dependent on our mind.
D. Happiness is inside us and is not far away.
