Question

my hand are dirty because_____ my bicycle A.l've repaired B.I repaired C.I've been repairing D.I was repairing​

Answer 1

D. I was repairing​

compare this fitting in a sentence to the others,

my hand are dirty because I was repairing my bicycle

my hand are dirty because I've repaired my bicycle

my hand are dirty because I repaired my bicycle

my hand are dirty because I've been repairing my bicycle