What should be done to keep the drug supply and drug flow under strict control

A．His generous suggestions and help.
B．His imprisonment in World War I.
C．The responsibility of helping others.
D．His impact on Western civilization.

A．She has to change the time for the trip.
B．She hasn’t decided where to go next month.
C．She can’t afford the time for the trip.
D．She will manage to leave this month.