根据汉语意思完成下列句子，每空一词。（每空0.5分，共10分）

1. 我们应该因火车晚点而向乘客道歉。

We should _________ to the passengers for the late _______ of the train.

2. 我们打赌看谁先背下这篇文章。

We are ______ _______ ________on who’s going to recite this text first.

3. 医生劝我姐姐通过健康饮食来减肥。

Doctors advised my sister to _________ _______ by following a healthy _______.

4.我一直想掌握天文学方面的知识。

I’ve been trying to _______ ______ _______ ______the knowledge of astronomy.

5.这个小村庄被青山绿水所环绕。

This small village is _________ __________green mountains and clear waters.

6.开学以来，她似乎已经安定多了。

She seems to have_______  ________ more since school started.

7.我总是愿意早开始，不愿把所有的事情都留到最后才做。

I always prefer starting early______ ______ leaving everything to the last minute.

8.你的身体既然已经完全康复，你就应该更加努力。

________ _______ you are quite well again, you should work harder.

“青年志愿者活动”坚持什么准则？