________its low cost, the appeal of iron as a building material lies in its strength, its resistance to fire, and its potential to span long distances

In children’s minds, winter is always _______ skiing, skating and making an snowman.

______ over and over again, but he stillcouldn’t understand.

My uncle gave me a ____ bag, in which there was a nice mobile phone as a present.

Hong Kong _______ 31st on a 2009 livability survey of world’s 140 cities by Economist magazine, the best performance among nine Chinese cities that edged into the list, the China News Agency citing a news report said.