Review the text and fill in each blank with no more than four words . Einstein was once invited to give a lecture at a ____1______. He was ______2_____ that he wished not to give it, but he didn’t want to _____3________. And then his driver, Hans, said that he would do it for him, because he had listened to his lecture many times and he had ______4______. When the lecture began, Einstein _____5______ in the audience and listened to Hans’ lecture. However, before Hans finished his lecture and ______6_____, a professor asked him such a ______7________ that he himself couldn’t answer. Einstein thought they were ______8______. But Hans asked Einstein to answer the question _____9_______ him, saying that was ______10_______ that his “driver” could answer it. Einstein stood up and answered the question ____11______. Then they left the university with Einstein _____12______. The story showed us that Einstein had got a great ______13______.