I am very sorry for_____ for so long.A.keep you waiting B.having kept you waiting C.waiting for you D.keep you wait

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Iamverysorryfor_____forsolong.A.keepyouwaitingB.havingkeptyouwaitingC.waitingforyouD.keepyouwaitIamv

I am very sorry for_____ for so long.A.keep you waiting B.having kept you waiting C.waiting for you D.keep you wait
I am very sorry for_____ for so long.
A.keep you waiting B.having kept you waiting
C.waiting for you D.keep you wait

I am very sorry for_____ for so long.A.keep you waiting B.having kept you waiting C.waiting for you D.keep you wait
B.having kept you waiting
for +doing
keep+doing

B

b

A