She is______new comer to______chemistry but she has already made some important discoveries．

1. A.
   the； the
2. B.
   the；/
3. C.
   a；/
4. D.
   a； the

She is ________ new comer to ________ chemistry but she has already made some important discoveries．

1. A.
   the, the
2. B.
   the，不填
3. C.
   a，不填
4. D.
   a, the

She is＿＿＿＿＿new comer to＿＿＿＿chemistry but she has already made some important discoveries．

A．the； the        B．the； ／        C．a；／        D．a； the

She is＿＿＿＿＿new comer to＿＿＿＿chemistry but she has already made some important discoveries．

A．the； the        B．the； ／        C．a；／        D．a； the