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:2019-06-11 03:54:10
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