Perhaps there is still quite a long way to go______ these researchers can find a

游客2024-02-17 17

问题 Perhaps there is still quite a long way to go______ these researchers can find an answer to the mystery.

选项 A、unless
B、until
C、where
D、before

答案 D

解析句子结构通过分析语意，我们可以知道前面的动作应该是发生在后一动作之前，所以得出D。

转载请注明原文地址:https://tihaiku.com/zcyy/3458645.html

相关试题推荐

随机试题

最新回复(0)

Inanexperimentpublishedlastmonth,researchersfromtheUniversityofIl