失业的成本包括（）。
A.经济资源的闲置；
B.失业人员的个人困难；
C.高失业社区的财政恶化；
D.以上都是。
参考答案：D
Last night my little brother was busy _____TV.[ ]
A.watch
B.to watch
C.watched
D.watching
_______ of the land in our city ____ covered with trees and grass.
A. Two fifths, is B. Two fifth, are C. Two fifths, are
