单词拼写。

1. He is new here so everything is _______ (不熟悉的) to him.

2. It's rude to ______ (指着) at anyone with your chopsticks.

3. I like loud music because it makes me _______ (有活力的)

4. The scientists have learnt a lot from _______ (科学的) studies.

5. Some kinds of animals are getting fewer and fewer. So we must do something to save the _______

    (濒临灭绝的) animals.