若{a_n}是等差数列，且a₁+a₄+a₇=45，a₂+a₅+a₈=39，则a₃+a₆+a₉=[ ]

A．39

B．20

C．19.5

D．33

_____the danger from enemy action, people had to deal with a severe shortage of food, clothing, fuel, and almost everything.   [ ]

A. As soon as                

B. As long as  

C. As far as                    

D. As well as