阅读下面短文，根据以下提示：1）汉语提示、2）首字母提示、3）语境提示，在每个空格内填入一个适当的英语单词，并将该词完整的写在相对应的横线上。所填单词要求意义准确，拼写正确。
When we meet with difficulties in life, we notice that some of us choose to bury heads in the sand. U, however, this attitude will do you no good, because if you have no courage to face them, how can you othem? Thus, be optimistic; as it can give you _(信心) and help you see yourself through the hard times. Keep optimistic, and you will be able to realize, in of some hardship, there’s always hope waiting for you, which will l you to success. Thomas Edison is optimistic; if not, the light of hope in his heart could not give light to the whole world. Alfred Nobel is optimistic, if not, the explosives and the Nobel Prize would not have _ into being. A rose may be beautiful, or may be not. That _ on your attitude only. So does success, and so does life. Difficulties do _(存在)，but if you are optimistic, then they are only episodes(插曲) on your long way success; there are more bridges than obstacles! The great British poet Shelley’s lines say, “If winter comes, can spring be fbehind?”