Read the text again. In your notebook, match sentences -fwith gaps 1-4. There are two extra sentences. A) This is possible because he makes clicking sounds with his mouth and his brain creates 3D images when it hears the echoes of the clicks. B) His superhuman abilities have surprised not only scientists but also his friends. C) To do this, you should concentrate on something new and challenging, as this is how the connections among nerve cells increase. D) Neurologists are fascinated by medical cases of people who have suffered a head injury or have a disability and yet managed to make an astonishing recovery. E) The complex structure of the brain has always been of interest to a number of professions including medical researchers, doctors, teachers and psychologists. F) Research into this phenomenon shows that there are a number of techniques which can help you increase the neuroplasticity of your brain and boost your brainpower .