根据句意及首字母的提示，补全单词。

1. I was waiting for the school bus but it didn't come. Then I r     _    it was Saturday.

2. Have you ever forgotten a r    _      birthday?

3. Tom was e      _   because he had stayed up all night working.

4. Don't forget to l     _    the door when you go out.

5. I will go to the c    _     party tonight. Would you like to go with me?

依据《建设工程安全生产管理条例》的规定，建设工程具有的特点不包括______。

A．投资规模大
B．建设周期短
C．生产环节多
D．参与主体多