A solar day is the length of time ____ the earth to moce once in circles aro

问题描述:

A solar day is the length of time ____ the earth to moce once in circles aro
A.takes B.takes it C.it takes D.when
为什么选C 怎么翻译啊?

答案是 C.it takes
例句
30 minutes is the time it takes Mary to reach school.