此題考查 not…until… 用于強(qiáng)調(diào)句的句式，即 it wasn’t until…that…（直到……才……）。如：

It wasn’t until last year that I saw my mother again. 直到去年，我才再次見(jiàn)到我母親。

It wasn’t until he saw her that he felt happy. 直到他見(jiàn)到了她，他才感到高興。

It was not for several years that I had an opportunity of seeing them. 我好幾年都沒(méi)有機(jī)會(huì)見(jiàn)到他們。