Question

It was until last year that he ______.

1. A.
   left his home town for a new start
2. B.
   came to realize the importance of leaving English
3. C.
   worked as an English teacher at a middle school
4. D.
   set out to build a new house of h his own

Answer 1

C
强调句型。注意until引导的句型是肯定的意思其谓语动词应该是延续性动词。