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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