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I ____ so busily recently that I ____ no time to help you with your math.
-That's OK. can manage it by myself.
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
正确答案是A
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