-Your sister looks beautiful. Is she a model or a film star -______. She's a doctor.

A．Learn how ωtake care of old movies
B．Visit a clinic to get advice on health
C．Get information for free event
D．Plan their study and research

A．by Sep 15, 2007
B．on Sep 15, 2007
C．between June 2-12, 2008
D．after June 12, 2008