Scientists say that the Mars-500 days_______they perform the task during the real mission-Good luck.I hope it goes well.A. after B. before C. since D. as请问为什么?另外,这句话怎么翻译?

问题描述:

Scientists say that the Mars-500 days_______
they perform the task during the real mission
-Good luck.I hope it goes well.
A. after B. before C. since D. as
请问为什么?另外,这句话怎么翻译?

选C

D.
主要是对Mars-500的一个补充。意思是:
科学家说火星-500是在真的情境中完成实验。
祝他们好运。希望实验会顺利。

Scientists say that the Mars-500 days___B____they perform the task during the real mission
-Good luck.I hope it goes well.
A.after B.before C.since D.as