题目

79. There are only five minutes left before the train leaves. You should run _______ . A. fast as possible as you can                           B. as quickly as you can C. as fast as possible                                         D. possible as fast as you can 答案：C________ you ever ________ any foreign countries? [　　] A．Do…go to B．Did…go to C．Have…gone to D．have…been to