火山中级
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火山中级

Reading Passage Volcanoes are powerful openings in the Earth’s surface where hot molten rock escapes from deep underground. These fire mountains have fascinated and terrified humans for thousands of years throughout history. When a volcano erupts, it can shoot lava, ash, and gases high into the sky above. There are about fifteen hundred active volcanoes…

太空探索中级
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太空探索中级

Reading Passage Humans have always looked up at the stars and dreamed of exploring the universe beyond our planet. Space exploration began in nineteen fifty-seven when the Soviet Union launched Sputnik, the first satellite. This small metal ball orbiting Earth started a race between nations to explore space further. Just twelve years later, American astronauts…

鲨鱼中级
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鲨鱼中级

阅读文章:鲨鱼是令人惊叹的海洋掠食者,它们在地球上生活了超过四亿年。这些古老的鱼类甚至在恐龙漫游地球之前就已经存在了。如今,世界各地的海洋中生活着五百多种不同的鲨鱼。它们的体型大小不一,从体型娇小的侏儒灯笼鲨……