输入种用大中家畜的，应当在国家质检总局设立的动物隔离检疫场所隔离检疫( )日；输入其他动物的，应当在口岸出入境检验检疫机关指定的动物隔离检疫场所隔离检疫 ( )日。

A．15；30

B．45；30

C．15；30

D．45；45

Experts are trying to work out a plan to deal with the problems caused by global warming________

it is too late.[ ]

A .when  

B．if  

C．before  

D．until