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

发布时间：2020-08-16 08:31:01


How many more decades will have to pass      scientists succeed in providing a cure for cancer?
A. when
B. since
C. before
D. until

网友回答

A. when
B. since
(答案→)C. before
D. until
解析：可联系答.案.网客服索取。
以上问题属网友观点，不代表本站立场，仅供参考！