--When ________ the next train leave for Boston, please?

--Usually at 13:15 but because of a small accident on the line, it ________ at 13:45.

1. A.
   does; is going to start
2. B.
   will; starts
3. C.
   does; will start
4. D.
   will; is to start

―When          the next train leave for Boston, please?

― Usually at 13:15 but because of a small accident on the line, it         at 13:45.

       A．does; is going to start                           B．will; starts

       C．does; will start                                     D．will; is to start

--- When         the next train leave for Boston, please?

--- Usually at 13:15, but because of a small accident on the line, it      at 13:45.

A．does, is going to start                       B．will, starts

C．does, will start                       D．will, is to start

—When ________ the next train leave for Boston，please?

—Usually at 13?15，but because of the small accident on the line，it ________ at 13?45.

A．does; is going to start B．will; starts

C．does; will start 　 D．will; is to start