局内投交的包裹超过（）未领取的，应收取逾期保管费。
A.一定期限
B.3天
C.5天
D.10天
参考答案：A
Among the most important questions the journalists wanted _____was how Greece could overcome economic crisis ?
A．to answer
B．being answered
C．answering
D．answered
下列物质属于纯净物的是
A．蒸馏水
B．空气
C．汽水
D．石油
