问题补充：
--- 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：
A. had been working; had had
B. have been working; had
(答案→)C. have been working; have
D. am working; will have
解析：句意：--我最近很忙，没有时间帮助你学习数学。--没关系，我自己能行。由recently 可知，第一个空用完成时态，排除A选项。完成时强调的是对现在的影响，从句意知道，最近很忙，一直忙到现在，而且还要继续忙，所以没有时间帮助你，所以用 现在完成 进行时 ，排除D现在进行时，第二空是现在没时间，排除B将来时。另外：have no time 就是没时间的意思，中间什么也不加。故选C。
考点: 考查动词时态的用法。
