【題目】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

【答案】A

【解析】

試題分析：考查非謂語動詞。邏輯主語the time and hard work與involve之間是被動關(guān)系，所以用過去分詞

表被動。句意：我們相信完成這樣一個重要的工程所用的時間和努力是值得的。故選A。

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