单选题 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

【正确答案】 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。