Исправь ошибку
1. when have you bought the book?
2. have you already seen the news
3. where have you stayed last time
4. I saw this film already
5. they just came back from Poland​

1. When did you buy the book?

2. Have you already seen the news? - OK

3. Where did you stay last time ?

4. I have seen this film already .

5. They have just come back from Poland​.

могу про молнии написать, только недавно сама готовила на эту тему)for example lightning - is a  grafting natural hazard that can catch you at any moment.  everybody  heard about it, but what exactly is it?   lightning is a form of atmospheric electricity. when cloud mass rises to a stratosphere, it flattens in it's top. water droplets and ice particles condence and fall, and friction between them create static electricity, that build up a charge. so, lightning occurs, when the voltage in this charge resistance surrouding air. 

lightning is an exiting and even   beautiful natural phenomenon with many different forms, shapes and colours. 

but lightning can cause serious damage to buildings and landscape, as well as starting a fire especially forest fire. it is possible for people and animals to get hit by lightning as well.

  it is important to know the warning signs and lighting to take precautions during thunder storms.

  if you see strong winds, rain and dark clouds, you have the potential for cloud-to-ground lightning.

open fields, isolated trees, fences, convertible cars and so on -   all of it attracts lightning. if the time delay between hearing the thunder and see the lightning is less than 30 seconds, you're in danger and need to enter a large, securing building as soon as you can. you must avoid water and phone during thunder storm.