单项选择题
A．copies B．collects C．reads D．knows
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