第20题: [多项选择]情景：你是小东。放学回家后你和同学相约去游泳，但是爸爸妈妈不在家，你需要让他们知道你左干什么了。 任务：请给爸爸妈妈写一张便条，告诉他们： ·你放学去干什么了； ·跟准在一起； ·大概何时能回家。请用下面格式。 Mum， Xiao Dong 参考答案: [参考例文] Mum I have came back home but both you and dad are out. I’m going to swim. Don’t worry for me, for I will go with my classmates. I think we will come back at six o’clock or so. If I can’t come back then, I’ll ring you. Xiao Dong
第21题: [单项选择]The Grand Canyon is located in ______ of the United States. A. the Midwest B. the Northeast C. the Southwest D. the Southeast 参考答案:C 答案解析:本题考查美国地理知识。科罗拉多大峡谷位于美国西南部州亚利桑那州(Arizona)西北部，科罗拉多高原西南部。亚利桑那州是通往美国西南部和墨西哥的门户，地理位置优越，紧邻广大的美国西南部市场。
第27题: [单项选择]{{B}}Passage One
Questions 11 to 13 are based on the passage you have just heard.{{/B}} A. Industry. B. Health. C. The future of our children. D. Clean air. 参考答案:A 答案解析:[听力原文]11-13
Our environment is being polluted faster than nature and man’s present efforts can p
