若a:b:c=2:3:7,且a-b+3=c-2b,则c=( )
A:7
B:63
C:10.5
D:5.25
He was late ____ the bad weather.
一杯可乐售价1.8元,商家为了促销,顾客每买一杯可乐获一张奖券,每三张奖券可兑换一杯可乐,则每张奖券相当于( )