Once natural resources the consequence will be unimaginable.A. use upB. run outC. are g

问题补充：

Once natural resources , the consequence will be unimaginable.

A. use up

B. run out

C. are given out

D. run out of

答案：

A. use up

(答案→)B. run out

C. are given out

D. run out of

解析：考查词组辨析：A. use up用完（及物）B. run out用完（不及物） C. give out用完（不及物） D. run out of用完（及物）所以A项应该是被动，B项是主动，C项应该是主动，D项应该是被动。句意：一旦自然资源被用完了，后果将很严重。选B。