完成句子。
1. 他们最后终于脱离了危险。
    They were out of danger _____.
2. 老师告诉我们茶叶是偶然发明的。
    Our teacher told us that tea was invented _____ _____.
3. 根据他所说的，你是错了。
    _____ _____ what he said, you are wrong.
4. 我昨天下午错拿了那把雨伞。
    I took the umbrella _____ _____ yesterday afternoon.
5. 这样我们的学习效果就比较好了。
    _____ _____ _____ we get better results in learning.