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
A dozen ideas were considered _____ the chief architect decided on the design of the building.
Scientists are trying to develop a special material, ________ they will make use of in spacecraft.
He was absent for two weeks, so he had a lot of homework to ________.
--- Do you think he will do me a favor? --- As far as I know, he is the last one to help others. He _______ be prepared to give you a hand, though.
Those lovely flowers were ______ for your mother for her 57th birthday, but as she is away, I would be glad if you accept them.