By the time the FDA discovered its illegal production, the tobacco company____ s

游客2025-06-18 28

问题 By the time the FDA discovered its illegal production, the tobacco company____ several years to develop new narcotic tobacco products.

选项 A、are spending
B、will have spent
C、spend
D、had spent

答案 D

解析因为是比过去发生的事情discovered更早的事情，所以应该选择过去完成时had spent。

转载请注明原文地址:http://tihaiku.com/zcyy/4123444.html

相关试题推荐

随机试题

最新回复(0)

CentralEngineeringCompanyBoardofDirectorsMee