Webelievethetimeandhardwork

问题详情：

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

       A. involving            B. to involve           C. involved             D. having involved

【回答】

 *C。考查非谓语动词。involved在此为过去分词，在句中做后置定语。

知识点：非谓语动词

题型：选择题