She brought with her three friends, none of_________ I had ever met before.
The problems at the meeting tomorrow are really hard to solve.
___ surprised me most was ____ he was too late for the important meeting, for he was chairman of it.
_______ all the inventions have in common is _____they have succeeded. A. What; what B. That; that C. What; that D That; what
Only when I read this story for a second time to appreciate its beauty.
By the time you have completed the essential training, you _____ exposed to virtually every new feature of the course.