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 has been confirmed____________he wasn’t the person who stole your bike.
. He is clever and has a____________for learning language.
The storm is moving slowly____________.
. He made up his mind to devote his life____________the river____________polluted.
. Many people think that it is ____________making such an experiment.