Tom work / works / worked as a fireman. Before he goes / go / going to
work in the morning he buy / buys / bought himself a large coffee.
When you ask / asks / asked him about his job, he explain / explained /
explains it can / could be dangerous sometimes. But he and his colleagues do / did /
does not have exciting days very often. They reads / read the paper and watch /
watched / watches training videos most of the time.
Tom's colleague Martin writes / write / written reports. Tom often do / did /
does some sports or helped / helps / help other firemen: They cleaned / clean /
cleans the fire engines and the equipment or teach / taught / teaches new
firefighters. Tom says / said / say: «I likes / like / liked to be a fireman!>>
Sometimes the fire station has / have / had a visit from pupils or other groups. Then
Tom try / tried / tries to explain everything and what a great job it am/is/are to be
a firefighter.

Tom works as a fireman. Before he goes to work in the morning, he buys himself a large coffee. When you ask him about his job, he explains it can be dangerous sometimes. But he and his colleagues do not have exciting days very often. They read the paper and watch training videos most of the time.

Tom's colleague Martin writes reports. Tom often does some sports or helps other firemen: They clean the fire engines and the equipment or teach new firefighters. Tom says, "I like to be a fireman!"

Sometimes the fire station has a visit from pupils or other groups. Then Tom tries to explain everything and what a great job it is to be a firefighter.

Explanation:
In this passage, we learn about Tom and his job as a fireman. We are given information about his daily routine, his colleague Martin, and some of the tasks they perform at the fire station.

The verb choices are important in understanding the correct answers. Let's break it down:

1. "Tom works as a fireman." - We use the present simple tense here because it's Tom's current job.

2. "Before he goes to work in the morning, he buys himself a large coffee." - Here, we use the present simple tense because it is a habitual action.

3. "When you ask him about his job, he explains it can be dangerous sometimes." - We use the present simple tense for "explains" because it refers to a general truth or a routine action.

4. "But he and his colleagues do not have exciting days very often." - We use the present simple tense for "do" because it refers to a regular occurrence.

5. "They read the paper and watch training videos most of the time." - We use the present simple tense for both "read" and "watch" because they are habitual actions.

6. "Tom's colleague Martin writes reports." - We use the present simple tense for "writes" because it refers to a routine action.

7. "Tom often does some sports or helps other firemen." - We use the present simple tense for "does" because it is a habitual action.

8. "They clean the fire engines and the equipment or teach new firefighters." - We use the present simple tense for both "clean" and "teach" because they are habitual actions.

9. "Tom says, 'I like to be a fireman!'" - Here, we use the present simple tense for "like" because it represents Tom's general opinion.

10. "Sometimes the fire station has a visit from pupils or other groups." - We use the present simple tense for "has" because it refers to a regular occurrence.

11. "Then Tom tries to explain everything and what a great job it is to be a firefighter." - We use the present simple tense for "tries" because it refers to a routine action.

Based on the explanations above, the correct answers are:

1. works
2. buys
3. explains
4. do
5. read, watch
6. writes
7. does
8. clean, teach
9. says
10. has
11. tries