Bob is the tallest boy ---of-- his class 为什么用of而不用in

Bob is the tallest boy ---of-- his class 为什么用of而不用in the boy is the tallest in his class改成义一句 Tom is the tallest boy in his class John is the tallest boy in his class “Jim. is. the. tallest. boy. in. his. class ” 改 He is one of ___ ___ in our class.A.tallest boy B.the talles he is the tallest of all the students in his class(保持原句意思) Liu Tao is the tallest of the boys in his class.（同义句）Liu Tao liu tao is the tallest of the boys in his class.同义句liu tao i He is the tallest of all the students in his class 的同义句 Peter is the tallest of other boys in his class.理由 ---- John is the tallest in his class.