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1、 Many countries are (quick) developing ways to use solar energy.
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2、 Please turn off the tap while (brush) your teeth.
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3、 The (pollute) of rivers makes it hard for fish to survive.
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4、 We should (use) both sides of paper to save trees.
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5、 A. 用方框中词语的适当形式完成下列短文，每个单词只能使用一次
planet, ocean, reuse, valuable, cycle, fresh, drop, pollute, waste, protect
The Earth is our blue , and we must take care of it. Only . 5% of water on Earth is water for drinking. We should plastic bottles instead of throwing them away. The water helps rainwater return to rivers and oceans. Many sea animals die because of plastic in the ocean. Turning off the tap while brushing teeth can reduce water . Oil spills make the dirty and harm marine life. A single of water can save a plant in dry weather. Forests are because they clean the air and provide oxygen. Governments make laws to endangered animals.
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6、 The government should ____ strict laws to protect forests.A、make B、makes C、making
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7、 —What can we do to help marine life?
—Stop ____ plastic into the sea.
A、throw B、throwing C、to throw -
8、 ____ of the students in our class recycle paper every week.A、Two third B、Two-thirds C、Second-three
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9、 "____ the electricity when you don't need it!" is a way to save energy.A、Turn on B、Turn off C、Turn up
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10、 —____ the water run when you're not using it!
—Sorry, I'll fix the tap.
A、Let B、Don't let C、Not let -
11、 ____ rivers are polluted by factories.A、Million of B、Millions of C、Five millions
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12、 We should turn off lights ____ leaving the room.A、while B、through C、before
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13、 —How do we read "3, 500" in English?
—It's ____.
A、three thousand five hundred B、thirty-five hundred C、both A and B -
14、 The ____ Ocean is the largest and deepest in the world.A、Pacific B、Indian C、Eastern
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15、 ____ plastic bags helps reduce "white pollution".A、Reuse B、Reuses C、Reusing
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16、 —____ waste water while washing vegetables.
—OK, I'll collect it for plants.
A、Don't B、Doesn't C、Not -
17、 Don't ____ in the library. It's a public place.A、smoke B、read C、study
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18、 —What can we do to reduce waste?
—We should ____ plastic bags and use cloth bags instead.
A、drop B、reuse C、brush -
19、 Freshwater is ____, so we must protect it.A、valuable B、wide C、quick
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20、 We should ____ the tap when brushing teeth to save water.A、turn on B、turn off C、reuse