城市绿化的建设和管理实行（）、（）、（）的原则。
参考答案：统一领导；统一规划；分级负责
– What made Lucy so happy?
---_______ a medal as her reward for her service.
A As she was given B Having been given C Have been given D Given
一袋大米重25千克，吃去了10千克500克，剩下的比吃去的多多少千克？
