A British man who ____ to play practical jokes ____ his own humorous art work in four major New York museums over the last two weeks.
David was very unhappy for ____ to the party which was held in his cousin’s house.
Jim has ____ the time he spends surfing the Internet in order to study hard in this new term.
We must apply what we have learned to our daily work because in no case _____ from practice.
We can never expect _____ bluer sky unless we create _____ less polluted world.
--I feel so upset. I’m afraid my company will be closed because of the terrible economic crisis.--______! Things are not so bad as they seem.