— Mr. Smith was really helpful when you were in financial difficulty during those years.
— Definitely. I can never appreciate his kindness ________.
A.seriously | B.well | C.enough | D.properly |
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— Mr. Smith was really helpful when you were in financial difficulty during those years.
— Definitely. I can never appreciate his kindness ________.
A.seriously | B.well | C.enough | D.properly |