根据所给句子及横线后的汉语意思写出正确形式的单词。

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

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

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

4．For best results, store the cassette with the tape fully _______________ （倒带）．

5．It was no _______________ （偶然） that he quit his job at the bank a day before the robbery．