题目

   Failure is common in our life. No one can avoid them. When we fail in doing something, we often feel very depressing. Sometimes failure can make us lose hearts. So no one are willing to fail. On the contrary, success can bring us sense of pride. If one enjoys his continuous success in his career, he will have confidence to himself. Therefore, failure is the mother of success. A failure doesn’t mean one can never be successfully. Those who are always afraid of failure they will never succeed. In a word, as long as we can get some lessons and experiences from our failure, we’ll Barack Obama has taken personal blame ________ the security failures which led ________ the attempt to blow up a plane on Christmas Day. A．of; toB．for; to C．on; onD．in; on