单选题 Several times of revisions will ______ before a final product is produced for a competition.
A. make
B. be made
C. makes
D. made

【正确答案】 B

【答案解析】初级问题空格位于助动词的后面，因此应在动词原形的A选项或B选项中选择正确答案。make是及物动词。后面没有宾语的时候应使用被动语态。这里是把make a revision(校订，修订)变成了被动语态。
谓语和非谓语动词的区分＞单复数＞主动语态与被动语态＞时态→参考“托业语法考点汇总”