How many more decades will have to pass ______ scientists succeed in providing a

游客2025-03-16 13

问题 How many more decades will have to pass ______ scientists succeed in providing a cure for cancer?

选项 A、when
B、before
C、since
D、until

答案 B

解析本题考查的是固定句式。when当……时候；before在……之前；since自从；until直到。还要有多少年过去之后，科学家才能够成功地发现治疗癌症的方法?

转载请注明原文地址:https://tihaiku.com/zcyy/3998964.html

相关试题推荐

随机试题

最新回复(0)

Forseveralyears,scientistshavebeentestingasubstancecalledinterfero