题目内容
----Mr. Smith was really helpful when you were in financial difficulty during those days.
----Definitely. I can never appreciate his kindness _______.
A. seriously B. enough C. well D. properly
B

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题目内容
----Mr. Smith was really helpful when you were in financial difficulty during those days.
----Definitely. I can never appreciate his kindness _______.
A. seriously B. enough C. well D. properly
B