If all of us give ________helping hand, we can make the world ________ better place.

does the sign over there read—"No person_______ smoke or carry alighted cigarette, cigar or pipe in this area．"

Had Tom studied harder, he ________ the exam.

Alan seems a lot taller than when I last saw him.— He ________. He’s grown a foot since you saw him in Shanghai.

－Why did you come back so early today －The English party was _______ till next Friday.