theories of gravity michael jones of the new space magazine is talking with space traveller li yanping about changes in the theory of gravity. ly = dr li yanping mj = michael jones listen to part 1. listen again and fill in the blanks. mj: hello, dr li yanping. it’s so good of you to talk to me. some _______ ask us why things always fall back to _____ if you throw them up in the air. could you ________ it?