Срешением этого ,буду , если вы также поясните, почему вы так написали.
use the verbs in brackets in the form of gerund or infinitive, add prepositions where necessary and translate.
1.after (to develop) mechanical refrigeration manufacturers had no difficulty (to start) (to produce) ice cream for mass consumption.
2.people tried (to make) ice desserts thousands of years ago.
3.the company tried (to install) the new refrigeration equipment as soon as possible and succeeded (to commission) the new shop by summer.
4.the new brand of ice cream needs (to advertise).
5.reduced-fat ice cream became popular and started (to be produced) on a large scale after a campaign for healthy food was launched in america.

1. She has already washed the dishes.

2. They have just cleaned their teeth.

3. Tom and Jess have recently seen this film.

4. I've have already written a letter to my friend.

5. My cousin hasn't found his book.

6. I can’t find sweets! Who has eaten all the sweets?

7. Mike has already done his homework and now is playing in the yard.

8. We have just had 3 lessons of Maths!

9. Our class has lately visited the Kremlin.

10. Susan has made a tasty cake for her birthday.

11. You have already read the book by Kipling.

12. Jack has already drank his tea.

13. We have already learned a lot of English words.

14. He has just listened to a new song.

15. I can’t write the dictation! I haven't learned the rule yet.

16. The children have already played that computer game.

17. My classmate hasn't translated the text about London Zoo yet.

18. The teacher has recently told us about Present Perfect.

19. My friend has never been to London.

20. This is a book I have never read. 

Объяснение:

1.We never heard this girl laughs. I've never seen her cry.
 2. We did not notice as he walked out of the class.
 3. Betty loved to watch as yellow fall from the trees.
4. Everyone loves to listen to the song of Michael Jackson?
5. I felt something hot touched my leg.
6. Have you ever seen the sun rises?
7. Little Prince every day watched as the sun sets.
8. My mother proudly watched as her daughter played the piano.
9. Do you love wathcing her dance?
10. Many times I heard her read books to her their young children.