.The other day I was showing the boys the weekly chemistry experiment when, ________ I knew it, the mixture was bubbling over everywhere.
He has lots of friend, only a few of ____ invited to his wedding.
Villagers here depend on the fishing industry, _____ there won’t be much work.
Mr. Smith got to ______ there was once an old temple.
The clerks were at work so ____ that nobody realized it was already lunch time.
The novel was so interesting that he read it _____ in a single day.