[单选题]A.ccording to the passage,the greatest challenge to the new high-speed railway plan is .A.technical issuesB.safety of the systemC.financial problemsD.maintenance of railway tracks
Short conversation3:What is the man supposed to do now according to the conversa
At the end of the conversation, some questions will be asked. Both the conversat
After the conversation, there are some recorded questions. Both the conversation
At the end of the conversation, you will hear some questions. Both the conversat
At the end of each conversation, some questions will be asked. Both the conversa
Conversation 1A. The goods were lost.B. The delivery will be delayed.C. They hav
Conversation TwoConversation TwoA. To inquire about switching majors. B. To
At the end of each conversation, you will hear four questions. Both the conversa
Understan ding a conversation-|||-Directions: Listen to a conversation and choos