Question

"___ Libya's oil production returns to normal, I guess, it will be fifteen months," said a UN expert．

A．After

B．That

C．Before

D．Since

Answer 1

C

考察固定句型。It be 一段时间before从句；一段时间以后某事才发生。句意：15个月以后利比亚的石油生产将恢复正常。