Plants are very important living things. Life could not go on if there were no plants. This is because plants can make food from air， water and sunlight. Animals and man cannot make food from air， water and sunlight. Animals get their food by eating plants and other animals. Therefore animals and man need plants in order to live. This is why we find that there are so many plants around us. If you look carefully at the plants around you， you will find that there are two kinds of plants： flowering plants and non-flowering plants. Flowering plants can make seeds. The seeds are protected by the fruits. Some fruits have one seed， some have two， three or four， and some have many seeds. But a few fruits have no seeds at all. An example of a fruit without seeds is the banana fruit. Most non-flowering plants do not grow from seeds. They grow from spores（胚芽）。 Spores are very small. Some spores are so small and light that they can float in the air. We may say that spores are quite the same as seeds. When these spores are all on wet and shady places， they usually grow into new plants.

1.The main idea of the first paragraph is that ______.

    A. plants are important for life　　　 B. plants cannot grow without air

    C. there are many plants in the world　　 D. we can not live without water

 2. What can we infer（推断） from the passage ？

    A. Of all living things animals are most important

    B. Spores are seeds

    C. All fruits of flowering plants have seeds

    D. Without plants， man will die out

 3. This passage may be taken from______.

    A. a medicine book　 B. a novel

    C. a science magazine　 D. an experiment report

 4. The underlined word “protected” in the third paragraph can be replaced by ______.

    A. damaged     B. polluted     C. prevented     D. guarded  

Careless driving____a lot of high accidents.　 A.affects　　 B.makes　 C.causes　 D.results

Our school is trying its best to improve our studying and working c____________.(环境)

The scientist buried himself in his studies in the belief _____ they could serve the country with his knowledge.

A. when    B. that    C. where     D. which

The poor man offered to wash dishes in the restaurant________three meals a day.

A．exchange 　　 B．exchange for

C．in exchange for D．to exchange

The ____________ shoes were covered with mud, so I asked them to take them off before they got into __________ car.

A. girl’s; Tom’s　 　 B. girls’; Toms’　 　　 C. girls’; Tom’s　　 　D. girl’s; Toms’

The teacher came to the classroom and demanded ____ what had happened.

A. his students to tell him　　 B. being told

C. telling him　　　　　　　　 D. to be told

Travelling is ________, but we often feel when we are back from travels.

A.interesting;tired　　　　　　 B.interesting;tiring

C.interested;tiring　　　　　　 D.interested;tired

Last term our maths teacher set so difficult an examination problem _____ none of us worked out.

A. that 　 B. as 　 C. so that 　 D. which

If you want to be a writer, I suggest that you should pay attention to __________ the works of Lu Xun.

　 A. read　　　 B. reading　 C. reader　　　　　 D. be read