I______doing my homework as scheduled but my fathers illness interfered. Could you excus

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I______doing my homework as scheduled, but my fathers illness interfered. Could you excuse me?

A.was to finish

B.was to have finished

C.should finish

D.ought to finish

请帮忙给出正确答案和分析,谢谢!

热搜:关于氨基酸代谢错误的论述是_________。