Oh, Mary, why are you killing your time this way ?Can’t you find something doing at all?
A. useful
B. valuable
C. worth
D. good
网友回答
A. useful
B. valuable
(答案→)C. worth
D. good
解析：考查固定搭配。固定搭配sth be worth doing某事值得被做；本句中worth doing修饰名词something。句意：Mary，为什么你用这种方法来消磨时间呢？你难道就不能找到值得做的事情吗？故C正确。