沃家庭中3G手机与其他成员用户拨打可视电话按（）元/分钟计费，不足一分钟按一分钟计。
A、0.90
B、0.60
C、0.15
D、0
参考答案：C
We______every day for almost two weeks ,so I’ll need to buy a large backpack to carry my supplies .
A．walk
B．have walked
C．have been walking
D．will be walking
