18.(A) The digital TV system will offer different programs.
　　(B) He is eager to see what the new system is like.
　　(C) He thinks it unrealistic to have 500 channels.
　　(D) The new TV system may not provide anything better.
　　18. W: Have you heard about a new digital television system? It lets people get about 500 channels.
　　M: Yeah, but I doubt they’ll have anything different from what we watch now.
　　Q: What does the man mean?
　　【答案】D
　　【解析】选项表明，该对话很可能是关于他对digital TV system（数字电视系统）的态度或评价，是肯定还是否定，听音时要注意男士的回答。对话中女士说the new digital television system lets people get about 500 channels(频道)。男士回答道yeah, but I doubt they’ll have anything different from what we watch now. 故答案为D。