10．Wastes resulting from man’s activities have been ________(tradition) discharged into the ocean.

　　Ⅱ.单句改错

　　1．Canada is the second biggest country in the world and as you go eastward, you see mountains.

　　2．The faces of four famous American presidents on Mount Rushmore can be seen from the distance of 60 miles.

　　3．During the Mid­Autumn Festival, it is tradition for Chinese to sit together and eat moon cakes and fruit, enjoying the full moon together.

　　4．The classroom is crowded with children who have poor eyesight, all of whom interested in painting.

　　5．The fact has worried many scientists when the earth is becoming warmer and warmer these years.

　　6．As far as I am concerned, masses of new evidence have come to light, some of them confirmed the assumption.

　　7．Instead, they prefer to surf on the Internet, watch TV, go shopping rather than to involve in sports games.

　　8．However I meet difficulties, I always think of my teacher and schoolmates.

　　9．So many thousands of terrifying people died every time there was an outbreak.

　　10．We had few days together last Christmas, because they spent most of their time visited friends.

　　完成课时作业(十五)

　　Unit 5　Canada—“The True North”

　　【基础自主梳理】

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