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
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
