按国际保险市场惯例，保险单与保险凭证具有同等法律效力。

根据汉语提示，用短语的正确形式填空，每空一词。

1. Maria taught the children to sing lively songs and perform short funny plays

    to _________ them _________ (使……高兴起来).

2. I'm looking forward to _________ _________ (收到……的来信) you.

3. He is always _________ _________ (对……满意) everything in life.

4. I am a new student, but I can _________ (相处) well with all my classmates. They all like me.

5. The students are _________ their _________ (尽力) to make the plan perfect.