The new drug will not be put on the market ____ it has proved safe on humans.A、i

游客2024-08-03 5

问题 The new drug will not be put on the market ____ it has proved safe on humans.

选项 A、if
B、until
C、since
D、when

答案 B

解析

转载请注明原文地址:https://tihaiku.com/zcyy/3704087.html

相关试题推荐

随机试题

最新回复(0)

There’sagoodantiquesmarkethere______Sundays.A、overB、byC、inD、onD句意：每到星期日