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.