IF I HAD KNOWN JOHN_______ILL LAST WEEK, I ‘D HAVE VISITED HIM.A.WAS B...

câu 13: - DE KTCL HKI CO DAP AN
Tiếng Anh DE KTCL HKI CO DAP AN

Câu 13: If I had known John_______ill last week, I ‘d have visited him.

A.was

B.were

C.had been

D.has been