用括号中所给单词的适当形式填空。

1. Let             go first. (they)

2. I like             a bus to school. (take)

3. A plane is             than a train. (fast)

4. Our school has two             students. (thousand)

5.             a lot for your help. (thank)

列车运行途中发现墙板内有冒烟、焦味时，应怎样处理？