Leaves are found on all kinds of trees, but they differ greatly ________ size and shape.

   A. on B. from   C. by      D. in

D


解析:

介詞的用法。介詞in表示“在......方面。句意：“人們發(fā)現(xiàn)樹上長著各種各樣的葉子，但它們的大小、形狀大不相同。differ from與…..不同，與本題題意符合。

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