某中学拟组织学生对所在地区开展民主管理情况的社会调查。下列最适宜作为调查对象的是该地区的（    ）

①居民委员会    ②街道办事处    ③村民委员会    ④区委区政府

阅读短文，选择正确的答案。

     Hi, I'm John.There are four seasons in a year. I like them all. In spring, it's warm. There are pretty flowers everywhere. I often go on a picnic with my parents. Summer is hot. I often go swimming in the pool. I like to wear my sunglasses. In fall, the weather is cool. I can help my grandpa pick apples. Winter is white. I can make a snowman. And I can go skating, too.

园林工人在栽某些树之前，往往要除去树体的大量枝条与树叶，其主要目的是（　　）

填入下面画横线处的语句，与上下文衔接最恰当的一项是(　　)

于是贾赦贾政等在前导引，又是两个老婆子秉着两把羊角手罩，鸳鸯、琥珀、尤氏等贴身搀扶，________，便是这座敞厅。因在山之高脊，故名曰凸碧山庄。