Ответ:

1.in the photo I see people riding a roller coaster

2.they are scared because the roller coaster is very fast and scary

3.my friends and I have fun in different ways, most often we go for a walk, walk in the park, go shopping, and so on

4.once, my friends and I went to an amusement park, where we rode carousels, rode roller coasters, ate ice cream, generally had fun, it was the best day of my life