— Have you finished your experiment report, Jane?— Oh, my God. I’ve _____ forgotten all about that.
Computers can do nothing.But once ______what to do, they show extraordinary power to do a great deal.
_______ twice a year, whether it is a car or a bus or a truck, is the rule that every driver must obey in this city.
What a pity! ________joined in the party, I would have met my old friend.
Today's homework was easy _______so I finished it quickly and went out to play.
Don't you think _______of great importance that we should keep fit by taking exercise regularly?