根据对话内容，从对话后的选项中选出能填入空白处的最佳选项，并在答题卡上将该项涂黑。选项中有两项为多余选项。(其中E=AB；F=AC；G="AD)"
M：Mr Smith, have you ever been to the Great Wall?
W：No, actually I’ve never been there. 小题1:
M：Would you like to go to the Great Wall?
W：小题2: I’ve been waiting for long. I’d be more than glad to.
M：All right. We’ll go by car. Can you get ready by eight?
W： 小题3: I’ll try to make it. Do you think I should ask the hotel to pack me a lunch?
M：小题4: I’ll take care of that. There’s a good restaurant there. Oh, it is likely to be windy on the wall at this time of year.
W：小题5: Shall I take a coat with me?
M：Yes, you’d better take a coat or a sweater. Well, I’ll be off now. I’ve got to see about the arrangements. See you tomorrow.
W：Till then.
A．No, I think there’s no need.
B．Sorry, but I am terribly busy.
C．Yes, I think that’s a good idea.
D．That’ll be fine.E．Is that so?
F．Of course I’ve heard much about that.
G．I don’t think so
)中国应如何借鉴德国的社会保障制度?