单元知识与高考链接A (教材原句:A special agreement ...would limit, or cut down on,the amount of harmful gases...)单元知识与高考链接D (考查单元语法)单元知识与高考链接B (教材原句:They are normally found in the Caribbean island of Puerto Rico....)单元知识与高考链接B (考查单元语法)单元知识与高考链接D(考查单元语法)单元知识与高考链接C (考查单元语法)单元知识与高考链接B (考查单元语法)单元知识与高考链接单元知识与高考链接单元知识与高考链接