When H7N9 bird flu first appeared,people didn’t know _____ doctors could cure it.
Mike was born ____ February, 2005.
—Where’s Li Hua? —Look! He ____ tennis on the playground.
Julia Morgan has just finished ____ her last movie.
––Mrs Zhang is very popular among the students. ––Yes. Her classes are ______ lively and interesting.
—____? —When she was seventeen.