问题补充:
单选题Theachievementsofthegreatestmindsinsciencecouldneverhavebeenreached________thepatientworkofhundredsofothers.A.were it not forB.had it not been becauseC.had it not been forD.if it had not been
答案:
C
时间:2020-10-15 12:03:47
单选题Theachievementsofthegreatestmindsinsciencecouldneverhavebeenreached________thepatientworkofhundredsofothers.A.were it not forB.had it not been becauseC.had it not been forD.if it had not been
C