Do you remember those days _______ we spent along the seashore very happily?
Nowadays people take___ exercise a day as they did in the past because of widely used automobiles.
They were standing so far away that I couldn’t_____ their faces clearly.
The dining room is clean and tidy, with a table already ______for a big meal.
____ some teenagers don’t realize is ____ difficult life can be after they get addicted to drugs.
Among Asimov's most famous works of science fiction, one _____he won an award, was the Foundation Trilogy.