题目内容：

Think before we speak!

It was a sunny and enjoyable day. Everyone in the railway station was waiting for the train 1. (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 2.(arrive) and everyone prepared to get into the train to their seats.

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

The empty seats were 3. (fill) and the train whistled (鸣汽笛) to move. An old man with a young boy 4. (age) around 15 had their seats just next to the friends' group. The young boy was so 5. (surprise) to see everything. He cheered, "Dad, the train is moving and the things 6. (move) backward."

His father smiled and 7. (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 great 8. (interesting).

A fruit seller passed 9. (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 lot 10.(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 so 11.(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 he 12. (operate). He is seeing different things in his life for the first time."

The young friends became very quiet.