Scientists have found that there are four levels of sleep, each ______ a little

游客2023-10-11 37

问题 Scientists have found that there are four levels of sleep, each ______ a little deeper than the one before.

选项 A、is
B、was
C、being
D、to be

答案 C

解析该题考查考生对独立结构的掌握。being a little deeper then the one before在这里对前面的陈述提供进一步的信息。

转载请注明原文地址:https://tihaiku.com/zcyy/3089661.html

相关试题推荐

随机试题

最新回复(0)

Waybackin1582,someItalianscientistsnoted,withdismay,thattherewas