Mrs. White became a teacher in 1985. She _____ for twenty years by next summer.

A. will teach    B. would have taught    C. has been teaching    D. will have been teaching

Mrs. White became a teacher in 1985. She _____ for twenty years by next summer.

A. will teach    B. would have taught    C. has been teaching    D. will have been teaching

Mrs. White became a teacher in 1985. She _____ for twenty years by next summer.

A. will teach    B. would have taught    C. has been teaching    D. will have been teaching

Mrs. White became a teacher in 1985. She _____ for twenty years by next summer.

1. A.
   will teach
2. B.
   would have taught
3. C.
   has been teaching
4. D.
   will have been teaching

Mrs. White became a teacher in 1985.She        for twenty years by next summer.   

A．will teach                                              B．would have taught 

C．has been teaching                                  D．will have been teaching