We mention the importance of giving up smoking once and again, but hardly ______ it.

I recognized John （ ） he entered the room.

The defense computers calculate way to （ ） the enemy missiles.

If I had remembered （ ） the window, the thief would not have got in.

Air pollution is obviously one of the major _____ of city life.

She is very （ ） to his ugly appearance.

（ ） has already been pointed out before, English grammar is not a set of dead rules.

It is very expensive to （ ） the fashion.

It was not known （ ） he had said during the interview.

() comes back first is supposed to win the prize.

The restaurant is busy on Sundays, so I’ll make a phone call today to _____ a table.

The price of fish is （ ） during the Spring Festival.