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 don’t grow from seeds. They grow from spores. Spores are so small and light that they can float in the air. We may say that spores are quite the same as the seeds. When these spores fall on wet and shady places, they usually grow into new plants.

　　50.   The main idea of the passage is that __________.

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

　　C. there are many plants around us      D. we cannot live without water

　　51.   Which of the following is NOT TRUE?

　　A. Plants can be divided into main types: flowering plants and non-flowering plants.

　　B. All fruits have seeds in them     

　　C. Seeds are protected by the fruits.

　　D. Some plants grow from spores.

　　52. The word “non-flowering ” in this passage means __________.

　　   A. 开花的      B. 有花的      C. 多花的      D. 不开花的

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