Что правильно?
a) We`re having a great time.
b) We have a great time.

a) What do you do now?
b) what are you doing now?

a) He`s flying to Olso tomorrow.
b) He flies to Olso tomorrow.

a) We see some friends this evening
b) We are seeing some friends this evening.

a) Farmers are working in the lieds.
b) Farmers work in the fields.

a) Give the gift to him.
b) Give the gift to he.

a) What is the Chinese like?
b) What are the Chinese like?

a) Brian haven`t got blue eyes.
b) Brian hasn`t got blue eyes

a) A vet can treats sick animals.
b) A vet treat sick animals.

He flies to Olso tomorrow*

We're having a great time.What are you doing now?He flies to Olso tomorrow*

We're having a great time.What are you doing now?HeWe are seeing some friends this evening.Farmers are working in the lieds.Give the gift to him.What is the Chinese like?Brian haven`t got blue eyes.A vet can treats sick animals.Вообще, я не знаю какой учебник, но думаю что это правильно.