Why couldn't people build really tall buildings in the past

Many years ago a London theatre was preparing for a first night. The producer wanted the play to be a success. In the evening, when the curtain rose and a storm broke out, the audience greeted it with an applause. The boys managed their work well, the scene always made an impression on the audience and each of the boys was paid a shilling a night. But when the performance had had a few weeks’ run, the owner of the theatre thought that it was too much and that sixpence a night would be quite enough. Then the boys decided to play a trick on him, so when the time came for the storm, the wind began blowing, but the sea was as calm as ever, there were no waves on it. The owner was very angry and shouted from behind the curtains, “Make waves, boys, make waves.” But the boys wouldn’t jump. Then at last one of them asked, “Do you want waves for a shilling a night or sixpence a night?”

У вас проблемы с воображением? или правда не можете написать, что вы собираетесь делать летом?
next summer i am going 1) to visit my granny in her village.
...                                 2) to read all the books in my Reading list.
...                                3) to make as many friends as it's possible.
...                                4) to learn to differ forest mushrooms.
...                                5) to have a nice suntan.
                              6) to do morning exercises.
Начало у всех предложений одинаковое.