1 . We practise earthquake safety ________ (程序，步骤) twice a year, so the kids were calm enough to protect themselves during the earthquake. (根据汉语提示单词拼写)

2 . As the impact of human activities continues to grow and the list of species in danger of ________ (灭绝，绝种) becomes longer, we are left with a question: can we afford to damage the “lungs of the planet”? (根据汉语提示单词拼写)

3 . Borrowed words are an o________ of language development that could hardly be avoided, but some language communities oppose adopting words from other cultures. There are countries that make ________ (干预，干涉) to keep their native language pure in order to defend their identity.