第21题: [单项选择]I'll contact my office in London straight away and ______ to you. A. have been faxing the contract B. have the contract fax C. have faxed the contract D. have the contract faxed 参考答案:D 答案解析:本题测试have sth.done意为“完成某事,做某事”。所以D选项是正确答案。
第30题: [单项选择]Windows XP is Microsoft' s most advanced desktop (70) system. A. operating B. programming C. security D. service 参考答案:A 答案解析:[解析] Windows XP是微软公司发布的桌面操作系统。