Choose the correct alternative. 1. I am going Canada. 2. They Vancouver. 3. He is not forest. 5. She 4. Our friends are going to mountain tomorrow. alligators. ✓a film about bears in going to take the train to summer. 6. My son is going to to build his house in the ✓not going to swim with the that ✓to Africa this

I think summer is the best season of all because it is warm, the nature is beautiful and we have great opportunities for rest. Summer is a time of holidays. We can go anywhere, spend our time near a river or a lake on fresh, green grass, swim in warm water, or climb mountains, play different games, ride a bicycle and so on.
I spend my summer holidays at my granny’s. There are many things there to do. What I did most of the time - I swam in the sea and sunbathed. Sometimes I made a fire with my friends at the seaside and cooked potatoes there. It was wonderful. We told anecdotes to each other, and did everything we wanted. I also got used to walk alone in the forest.
When August was coming to its end, I went on a small voyage by ship. The ship name was “Sevastopol”.
But this summer wasn’t for me only sugar and honey. I have passed through the graduating exams after school and entering exams in the university. So the bigger part of my summer vacations I spent sitting with the books. Of course, it was not interesting, but I’m glad that I did it because now I’m a student of the best university in our country

1. Present Perfect Progressive. Так как он начал читать книгу, читает ее уже 2 часа и неизвестно когда закончит. В предложениях с Present Perfect Progressive, как правило, указывается период времени, в течение которого происходит действие. Период времени выражен: for two hours. Так же это время показывает вс глагол has been и глагол с окончанием ing.
2. Present Perfect. Время  обозначает действие, которое завершилось к настоящему моменту или завершено в период настоящего времени. В предложении говорится что он прочитал 53 страницы. Так же это время показывает вс глагол Has и глагол в 3 форме.