78．We are impressed by the energy and _______________ (敬业精神) shown by the teachers．

77．With the advance in science, the ______________ (界限) of human knowledge are being pushed further out．

第一节 单词拼写

根据所给句子及横线后的汉语意思写出正确形式的单词。(共5小题；每小题1分，满分5分)

76．She exhibited great powers of ______________ (耐力) during the climb.