选择填空:

Mr Green ______ us the answer to the question.

[　　]

A. said　　  B. told　　  C. spoke　　 D. talked

 Our foreign teacher Mr Green ______us English since three years ago.

A. has taught B. is teaching C. taught  D. teaches

Mr. Green told us    too much time    reading novels.

A．don’t take; on                        B．not to take; in

C．not to spend; in                         D．don’t to spend; on

Mr.Green teaches    computer science.?