Поставить во множественное число / this is my computer. 2)he has a new suti. 3)this metal is very hard .4) that ship is a russian one. 5) i heard her voice ., 6) his dog does not eat bread. 7) the plate was on the table. 8) this town is very large 9) i was talking to her in the street yesterday.10) is that girl your sister? 11) i shall give you my book. 12)this story will be a good one. 13 is this a good match? 14)the boy put his book one the desk. 15) she took off her hat. 16)that house is new. 17) the pupil put his book into the bag.18) is this student coming with us

These are my computers
They have new suits
These metals are very hard
Those ships are Russian ones
We heard their vioces
Their dogs dont eat bread
Some plates were on the table
Those towns are very large
We were talking to her on the street yesterday
are those girls your sisters
We shall give you my books
These stories will be good ones
Are those some good matches
Boys put his books on the desk
They took off their hats
Those houses are new
Pupils put their books into the bag 
Those students are coming with us

1. There are my computers
2. They have new suits.
3. These metals are hard.
4. Those ships are the Russian ones.
5. We heard their voices.
6. Their dogs don't eat bread.
7. The plates were on the table.
8. Those towns are large.
9. We were talking to her in the street yesterday.
10. Are those girls your sisters?
11. We shall give you our book.
12. These stories will be the good ones.
13. Are these a good matches?
14. The boys put their books on the desk.
15. They took off their hats.
16. Those houses are new.
17. The pupils put their books into bags.
18. Are these students coming with us?