第5题: [单项选择]A. She has decided to go to one of the summer schools. B. She is going to relax. C. She is going to work all the time. D. She has not decided yet. 参考答案:B 答案解析:[解析] M: What are you going to do this summer W: I thought for a while about going to
第12题: [单项选择]Corn originated in the New World and thus was not known in Europe until Columbus found it ______ in Cuba. A. being cultivated B. having cultivated C. been cultivated D. cultivating 参考答案:A 答案解析:[解析] 分词与其逻辑主语it(corn)之间为被动关系。