① The person who discovered X-rays was a German scientist.
② They’re creating robots that will help people with disabilities.
③ The world record that he set in 2016 has not been broken yet.
④ Tell me about the person whom you admire the most.
⑤ The products she invented have helped many people around the world.
⑥ This is the new vaccine that we have been waiting for.
⑦ The project on which they have worked for years will be completed.