相关试卷
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1、 语法段落填空
The ocean (be) a large ecosystem. It (cover) about 71% of the earth's surface. The ocean (produce) about 70% of the earth's oxygen. It (hold) a lot of water. The water (rise) to the sky, falls onto the land, and then (return) to the ocean. This cycle (help) keep the earth's water clean.
But now the ocean (face) many problems. There (be) a lot of plastic waste in the ocean. We should (take) action to protect it.
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2、 The (生态系统) of the ocean is very important.
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3、 We need to (保护) our natural world.
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4、 Coral reefs are in danger because of (污染).
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5、 The (气候) in the desert is very dry.
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6、 Wetlands help get r of pollution.
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7、 The Arctic is facing serious p due to climate change.
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8、 Plants can s water in their roots.
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9、 The Great Barrier Reef is the largest coral r in the world.
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10、 We should p wild animals from being killed.
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11、 The e includes all living and non-living things in an area.
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12、 It's important ____ the environment.A、protect B、to protect C、protecting D、protected
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13、 The wetlands（湿地） ____ many kinds of plants and animals.A、is home to B、are home to C、is home of D、are home of
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14、 We can help protect ecosystems ____ planting more trees.A、by B、with C、for D、at
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15、 ____ the climate is changing, animals are losing their homes.A、So B、But C、As D、Or
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16、 Many animals ____ in the ocean.A、lives B、live C、living D、to live
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17、 The sun ____ light and heat to the earth.A、give B、gives C、giving D、to give
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18、 We should ____ rubbish to protect the ocean.A、not throw B、not to throw C、not throwing D、not thrown
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19、 Forests ____ the "lungs" of the earth.A、are called B、is called C、called D、calling
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20、 Wetlands ____ like the "kidneys" of the earth.A、act B、acts C、acting D、to act