The U.S. official said North Korea --- and Iran --- should follow in the steps of Libya, which last December said it would work______ to allow international weapons inspectors to do their work.

A.unconditionally

B.unwillingly

C.unfortunately

D.uncomfortably

答案及解析： A

解析：

本题考查副词。A. unconditionally无条件地；

B. unwillingly不情愿地；

C. unfortunately不行地；

D. uncomfortably不舒服地。根据句意这里应当是无条件接受武器调查人员的检查，选A