答案：freedom　

　　8．解析：考查代词。此处应用宾格形式，作动词interest的宾语，故用them。

　　答案：them　

　　9．解析：考查介词。in the classroom意为“在教室里”，符合语境，故用介词in。

　　答案：in

　　10．解析：考查形容词比较级。根据上文可知，9年级和12年级的学生比较，自然是年轻一些，故用形容词的比较级形式，即younger。

　　答案：younger

　　E

　　Styrofoam is plastic __1__ a bad reputation.

　　It cannot be recycled without releasing (释放) dangerous pollutants into the air. The U．S. Environmental Protection Agency __2__(say) it is the fifth largest creator of dangerous waste.

　　Scientists from the U．S. and China have discovered that mealworms can digest plastic. One mealworm can digest a pill­sized amount of plastic a day.

　　Study co­author Wei­Min Wu says that in 24 hours, the plastic __3__(turn) into carbon dioxide.

　　Are the worms hurt by __4__(eat) plastic? The study found that worms eating Styrofoam were as __5__(health) as worms eating bran(糠)．

　　Styrofoam is a lightweight material, about 95 percent air, with very good insulation properties(绝缘性), according to Earthsource. org. It is used in products from __6__(cup) that keep your drinks hot or cold to packaging materials __7__ protect items during shipping.

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