题目内容：

阅读下面的短文，用括号内所给词的适当形式填空，必要时可加助动词。

Think before we speak!

It was a sunny and enjoyable day. Everyone in the railway station was waiting for the train1.(arrive). Among the crowd, there was a group of young friends who were on board for vacation.

It was a busy station with a lot of people and some juice shops, coffee and tea stalls, newspaper shops, etc. The train was arriving and everyone prepared to get into the train to their seats.

The group of friends made loud noise2.(welcome) the train as it moved into the station. They ran to get their seats before anyone entered the train.

The empty seats were3.(fill) and the train whistled (鸣汽笛) to move. An old man with a young boy4.(age) around 15 had their seats just next to the friends' group. The young boy was so5.(surprise) to see everything. He cheered, "Dad, the train is moving and the things6.(move) backward."

His father smiled and7.(nod) his head.

As the train started moving fast, the young boy again screamed (尖叫) , "Dad, the trees are green in color and run backward very fast." His father said, “Yes, dear," and smiled.

Just like a kid, he was watching everything with great8.(interesting).

A fruit seller passed9.(sell) apples, bananas and oranges. The young boy asked his dad, "I want to eat apples." His father bought some for him. He said, "Oh, this apple looks a lot10.(sweet) than it tastes. I love this color." The group was watching all the activities of this boy and asked the boy's father, "Is your son having any problem? Why is he behaving so11.(different)?"

"His son is mad, I think," a friend from the group made fun of him and shouted.

The father of the young boy, with patience, replied to the friends’ group, “My son was born blind. Only a few days ago he12.(operate). He is seeing different things in his life for the first time."

The young friends became very quiet.