下图反映北京的城市职能是 （    ）      

材料一  “方里而井，井九百亩，其中为公田。八家皆私百亩，同养公田，公事毕，然后敢治私事。”

                                                            ——《孟子．滕文公上》

材料二  “至秦则不然，用商鞅之法，改帝王之制，除井田，民得买卖。富者连阡陌，贫者无立锥之地。……故贫者常衣牛马之衣，而食犬彘之食。”

                                                              ——《汉书．食货志》

材料三  金宝庐舍，转瞬灰炽，惟有田者，岿然而独无恙。故上至绅富，下至委巷工贾，赢十百金，即莫不志在良田。

                                                     ——（清）陶煦《租核．推原》

下列有关我国西北地区的描述，正确的是（　　）

根据所给词的适当形式、音标或语境的提示，完成短文。

      Watertown is a great place for a family to take a vacation. Teenagers want to visit the world's ____ (large) water slides and eat at the Uncle Bob's. A different rock band ____ (play) at Uncle Bob's every night. Kids will enjoy the Clown City Café. They have organized games and the staff dress up  ____ (æz)clowns(小丑).

      There is also a lot for parents in Watertown. ____ (if) they love good food, they can find it at the Farmer's Market where the food is both ____ dɪ'lɪʃəs and cheap. While the children have fun, parents can take dance lessons on the beach. And ____ ('evribɒdi) can learn something in Watertown. There are three ____ (museum). Teenagers love the Sports Museum and kids enjoy the Science Museum. Parents will spend many hours ____ (walk) through the History Museum.