Make notes about your school. Include information from
Exercise 2
The name of your school
The size (big, small?)
Pupils' age
Uniform?
Time school starts and finishes

2 и 6 будут Past indefinite 
Остальные ,соответственно,- Present Perfect
I have built a house.
I have built a house when he came out of school
I have never built houses
I haven't built a house
Have you ever built a tower?
We built a house today
I have not yet learned words
We haven't made tutorials
They have never seen a crocodile
They haven't seen yesterday the crocodile

Так. На заметку.
Время Present Perfect обозначает действие, которое завершилось к настоящему моменту или завершено в период настоящего времени

Время Past Simple(indefinite) используется для обозначения действия, которое произошло в определенное время в и время совершения которого уже истекло

There are lots of exciting things to do in your free, but the activity I enjoy the most is listening to music. It helps me relax and leave my everyday problems behind. Nowadays music is very versatile (разнообразная) and you always have a choice. We often share our opinions on new albums with my friends. Music a great topic for discussion. But there is nothing more enjoyable than listening to it. Lyrics are quite important for me, but expressive rhytms and sounds make my heart beat faster. I like many types of music. I firmly believe music is the greatest art in the world.