根据句意和所给的中文提示，写出句子中的单词。

1．It is very difficult to make correct ________（决定）all the time．

2．Do you remember your  ________ （父母）birthdays?

3．If you know anyone else who  ________ （收集）stamps，please tell me．

4．It’s ________ （有必要的）for us to master some life skills．

5．Have you ever felt tired in the middle of the day，________ （尤其）after lunch?