The supervisors could have prevented this problem______about it beforehand.A、if

游客2025-03-27 18

问题 The supervisors could have prevented this problem______about it beforehand.

选项 A、if they knew
B、had they known
C、if had they known
D、if they would know

答案 B

解析如果if条件句中含有were，should，had等词，可以省去if，并把were，should，had 移到从句首，意思不变。

转载请注明原文地址:https://www.tihaiku.com/zcyy/4015228.html

相关试题推荐

随机试题

最新回复(0)

Theproblemhasbeen______mymindallday.A、preyingonB、gettingatC、takingo