We believe the time and hard work _______ in completing such an important project are worthwhile.

A. involved B. involving

C. to involve D. to be involved

A

【解析】

試題分析：考查過去分詞做定語(yǔ)。句意：我們認(rèn)為用大量的時(shí)間和努力工作來完成這樣一個(gè)重要的項(xiàng)目是非常值得的�？疾檫^去分詞做定語(yǔ)。過去分詞做定語(yǔ)是用來表示被動(dòng)或者完成。本句中involve用來修飾前面的time and hard work.的，用來表被動(dòng)。答案選A。

考點(diǎn)：考查過去分詞做定語(yǔ)。

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