April 21 was the national memorial day ____ were killed in Yushu Earthquake on April 14 2010.A in honor of any one who B in celebration of those whoC in memory of whoever D in charge of no matter who
It was _____ the old clock that the old man spent the whole morning at home.
_____ what the six blind men said sounded!
Was it _____ she heard with her ears _____ really made her frightened?
Is this factory _____ you visited the other day?
Never _____ time come back again.