18． My mother ____ for Beijing in a few days. I wonder when the earliest plane ____ on Monday?

18． My mother ____ for Beijing in a few days. I wonder when the earliest plane ____ on Monday?

     A． leaves; takes off              B． is leaving; takes off

     C． is leaving; is taking off         D． leaves; is taking off

My mother ____ for Beijing in a few days. I wonder when the earliest plane ____ on Monday?

   A. leaves; takes off                        B. is leaving; takes off

   C. is leaving; is taking off               D. leaves; is taking off

18． My mother ____ for Beijing in a few days. I wonder when the earliest plane ____ on Monday?

My mother        Beijing in a few days？I wonder when the earliest plane        on  Monday．

A．1eaves；takes off                                       B．is leaving；takes off

C．is leaving；is taking off                                    D．1eaves；is taking off