Children это множественное число.
Детей сосчитать можно, и есть форма единственного числа - child.
Так, что это исчисляемое.
Ответ:
Space is incredibly beautiful. There are so many stars in it that no one can count. In space, in addition to stars, there are nine planets, as well as different satellites and meteorites. The first cosmonaut was Yuri Gagarin, and Belka and Strelka were first animals be able to fly into space
1. Children have toys.
2. He has a computer.
3. Computer is new.
4. Garden behind the house.
5. Garden is big.
6. There were flowers in the room.
7. The women took the documents and left the room.
8. The guys will receive a letter next week.
The pencil case is blue.
Sue is 17 years old.
Is the Art lesson in class b?
Anna is going to the school.
My name is Mark.
What's your favourite subject?
My PE class is on Mondays and Wednesdays.
The class recor-book is on the desk.
History lesson is on Tuesdays.