单选题 I ______ writing the paper as scheduled, but my father's illness interfered. I hope you will Give me some extra time.
A. am to have finished B. was to finish
C. was to have finished D. ought to finish

【正确答案】 C

【答案解析】我本来应该按照预定时间写完论文的，但是因为我父亲生病而耽搁了。我希望你能再多给我一点时间。
[答题点拨] was to表过去将来时；由于结果会对现实造成影响，所以应该用完成时。