.

Тут два разных задания.
см. закреп.

про рост уже написали в примере, поэтому буду писать про остальное.

weight:

Tina is lighter than Ruby. Alice is heavier than Tina. Ruby is heavier than Alice. Tina is lighter than Alice. Ruby is the heaviest of all. Tina is the lightest of all.

age:

Ruby is older than Alice. Tina is older than Ruby. Alice is younger than Tina. Ruby is younger than Tina. Alice is the youngest of all. Tina is the oldest of all.

experience:

Tina is more experienced than Alice. Alice is less experienced than Ruby.  Tina is less experienced than Ruby. Ruby is more experienced than Alice. Ruby is the most experienced of all.

1. They aren't having lunch.

2. She isn't doing housework.

3. He isn't having a shower.

4. They aren't playing football.

5. Dog isn't barking.

6. Masha isn't reading magazines.

7. Marina isn't wearing skirts.

8. They aren't visiting their parents.

9. Kris isn't working.

10. She isn't sitting on a sofa.

Объяснение:

Т.к. это отрицательные предложения, то к "to be" добавляется not: is+not=isn't, am+not=am not, are+not=aren't.