20

The weather was nice - just a perfect day for a family outing to the zoo. There were lots of children there on that day. 

(were - были, мн. число от to be. Past Simple, Неправильные глаголы)

BE

21

All of  them were smiling, enjoying the lovely day.

(дословно "все из них". Местоимения) 

THEY

22

It was the Greens’ second visit to the zoo.

(second - второй.  Числительные)

TWO

23

The first time they were there was five years before when their older son Peter was seven and Adam, who was five years younger than his brother, was a two-year-old toddler.

(youngER - моложе.  Сравнительные степени прилагательных)

YOUNG

24

Of course, Adam did not remember anything and the zoo looked new to him. But Peter remembered a lot and the first place he wanted to see was the ice cream stall.

(didn't remember - не помнил; отрицание в прошлом.  Past Simple)

NOT REMEMBER

25

The Greens bought four ice creams and stopped in front of the enclosure for seals.

(bought - купил. Past Simple, Неправильные глаголы)

BUY

26

It was feeding time and Adam was watching wide-eyed while the zookeeper was throwing fish to the seals.

(was throwing - кидал. Past Continuous)

THROW

27

“They are so cute!” the boy turned to his parents. “If you allow me to have a pet, I will take that small seal!” and he pointed to a young, joyful seal.
The father only smiled.
“Can I give him my ice cream?” Adam went on.

(I will take - я возьму. Future Simple)

TAKE

28

“No, you can't," said the father. "Look - it  is written here DON'T GIVE FOOD to the animals", and he pointed to the tablet on the enclosure fence.

(It is written - это написано. Present Simple Passive, Неправильные глаголы)

WRITE