问题描述：
形容词最高级后面的介词：in of的区别?
Zhang Hua is the tallest of the three．
He works (the) hardest in his class.
请教在什么情况下用 in,什么情况下用 of .
Zhang Hua is the tallest of the three．
He works (the) hardest in his class.
请教在什么情况下用 in,什么情况下用 of .
问题解答：
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