Ex 5. Here is a letter from Sarah. She lives in
Kenya. Write a letter to Sarah, answer her
questions.
...Kenya has one of the most beautiful environments
in the world: beautiful forests, a lot of wildlife. But
the trees are cut down and the land is sold. They are
not protected and then our nature will not be
beautiful. What is the biggest environmental problem
in your town? What are your concerned about? What
do people do to change the world for better?​

как понять нулевой суффикс?

Помогите!!!!!!

№2 Сomplete the sentesents with the correct word:

My brother's birthday is....... 14th February.

1)in    2)at   3)by   4) on

№11 What's the most dangerous month of the year in Britan?

1)January   2)March   3)July   4)When you are in hospital

№12. What's the most dangerous day of the week?

1) Sunday   2)Wednesday   3) Weekends   4)Friday

№14. What's the most danderous time of day?

1) 8:00am   2) 11:00 am    3) 4:00 am   4) 5 pm

Choose the word from 1), 2), 3) or 4) that best fits the gap.

№15. Tney didn't manage to get to the party....... it was nearly over.

1)by the time    2)before   3)untill   4)when

№26. Mike and Tim did well on th tesr because......of them had studied hard.

1) either   2) both   3)neither   4)all

№27 They didn't manage to get to the party.....it was nearly over.

1)by the time    2)before   3) until   4)when

№28 ''Which pyjamas ara yours? ''The yellow......

1)ones   2)one   3)two    4)first

№29 If I......him, I would have spoken to him.

1) have seen   2)was seeing  3) having seen  4)had seen

Заранее огромное спасибо!!!!!!!!!

Разбери как части речи слова : собака, ранняя (пташка) например....