单选题 There was so much ______ material in the essay that it was difficult to get the author's message.
【正确答案】 D
【答案解析】(impertinent离题的,不得要领的)。句意为:文中的许多材料不得要领。因此,很难得到作者的启示。A.exemplary模范的;B.commonplace平凡的;C.superficial表面的。