I ____ so busily recently that I ____ no time to help you with y

I ____ so busily recently that I ____ no time to help you with your math.
-That's OK. can manage it by myself.
A、have been working: have
B、have worked; had
C、am working; will have
D、had been working; hadhad
【正确答案】：A
【题目解析】：【考点点击】本题考查动词的一般现在体。【要点透析】 recently常与现在完成时或一般过去时连用,由于第一个空表示的是从过去到现在这段时间一直在忙,故用现在完成进行时。第二个空应用一般现在时,强调现在的状态。