There have been many changes in _____ history of _____ English language.
Whenever I met her,__________ was fairly often, she greeted me with a sweet smile.
By 16:30,__________ was almost closing time, nearly all the paintings had been sold.
A lot of language learning,__________ has been discovered, is happening in the first year of life, so parents should talk much to their children during that period.
The whole town __________ by the flood after it has been raining for 3 days nonstop.
-Alvin, are you coming with us?-I'd love to, but something unexpected __________.