Fill in the missing words

Dr Tomas Streyer looked around the control room at his team of and engineers. He was excited and frightened but he to seem calm. In a few , they might start to discover something amazing: how the universe began. He looked out of the window at the beautiful blue sky and tried to breathe slowly. ‘Ready,’ he said. He the first button and the complicated computers and machines came to life. ‘Set,’ he said. He pressed the button and switched on the large particle accelerator that lay under the towns and fields of Switzerland. ‘Go,’ he said. And, at twelve o’clock, he pressed the final button. For a second, he felt as if he was , because everything went completely black. Tomas shouted in shock, but the were already on again. That was not part of his plan. He had no what had just happened.