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1.在薄冰上滑冰是很危险的。It’s very dangerous to skate on the thin ice. 2. 保持教室干净是我们的责任。 It’s our duty to keep the classroom clean. 3. 要爬上喜马拉雅山是很困难的。 It’s difficult to climb Mount Qomolangma. 4.网上购物很容易。It’s easy to buy things on the internet. 5. 乘飞机旅行很舒服。It’s comfortable to travel by plane. 下载地址：http://files.eduu.com/down.php?id=52353 (责任编辑：admin) |