题目内容
--- I _______ so busily recently that I ______ no time to help you with your maths.
---That’s OK. I can manage it by myself.
A. had been working; had had B. have been working; had
C. have been working; have D. am working; will have
【答案】
C
【解析】略
练习册系列答案
相关题目