翻检《全唐诗》可知，唐诗所涉茶产地6道、27州，其中90%集中于江南、山南、淮南、剑南地区。唐朝张途记录安徽祁门一带：“千里之内，业于茶者七八矣，由是给衣食，供赋役，悉恃此祁之茗。”由此反映出唐代（    ）

①南方经济发展水平提高

②经济重心已经移向南方

③茶业由副业上升到主业

④农产品商品化水平较高

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　The Browns are  1  Smiths' neighbours. Mr. Brown's name is John. But when his neighbours talk about him, they  2  him. “Mr. Going-to-do”. Do you know why? Mr. Brown always says he is going to do something, but he  3  does it. Every Saturday Mr. Brown  4 to the Smiths' back door and talks to Mr. Smith. He always says he  5  do something.“I'm going to clean my house today, ”he says,   6  “I'm going to wash my car tomorrow, ”or “These trees in front of my house are  7  big. I’m going to cut them down next week. ”Mr. Smith usually says, “Are you going to do, John? ”He knows his neighbour is 8  going to clean his house, or wash his car, or cut down any trees. Then he says, “Well,   9  me, John. I’m going to do some work in the house. ”And he does. Mr. and Mrs. Smith often say to their only child Dick, “Are you going to do something? Then do it. Don't be  10  ‘Mr. Going-to-do’. ”