— I'm sure our surroundings will become better.

— It is still a problem _____ we can control the pollution. [ ]

A. that

B. whether

C. if

D. why

出口粮食一批，散舱装，CIF价为300万美元，加一成投保平安险及一般附加险中的短量险，总保费率为0.6%，合同规定绝对免赔率为0.5%，到达目的港后，发现短量0.7%。试计算保费及保险人赔款金额。