It is not until ___ the things ___ we used to have ___ we learn to cherish

B
It is not until ___ the things ___ we used to have ___ we learn to cherish.
选B。not until 用于句首要倒装，这是个t is not until 的强调句，不用倒装。第二个是个定语从句，that是the things 的引导词，第3个是强调句型必须用that.

这是not until 的强调句。
译为：直到过去的事失去了，我们才懂得珍惜。
第一个that引导定语从句，第二个that前引导的句子才是被强调部分。

B

D
It is not until 后面要倒装

D