--- I so busily recently that I no time to help you with your math.
--- That’s OK. I can manage it by myself.
A. have been working; have
B. have worked; had
C. am working; will have
D. had been working; had had
网友回答
(答案→)A. have been working; have
B. have worked; had
C. am working; will have
D. had been working; had had
解析：recently常与现在完成时或一般过去时连用。第二空应用一般现在时。