题目内容：

Look at this boy. He is an English boy. His name is Alan Brown. This is his school. His school ID card is 36872368. His teacher is Miss Black. She is a nice teacher. Look! What's that? It's a schoolbag. It's blue. It's Alan's schoolbag. His red jacket is in it. Where is his watch? Oh, Alan lost it this morning.

根据短文内容补全句子。

1.The boy's last name is _________.

2.Alan's school ID card number is _________________.

3.The color of his schoolbag is ___________.

4.The color of his jacket is ___________.

5.Alan lost his ________ this morning.