【简答题】A) have happened B) happens C) happened D) had happened
【判断题】从历史地理学的角度来看,农业与牧业间的相互依赖使国家容易统一。()
【单选题】What ____ him on his way to school yesterday? [ ]
【简答题】后牙的颊舌尖在咀嚼运动中具有不同的功能,上后牙 ______ 尖和下后牙 ______ 尖为支持尖,与对颌牙颌面窝沟相对应;上后牙 ______ 尖和下后牙 ______ 尖为引导尖,主要作用是引导侧向咬合运行。
【判断题】从历史地理学的角度来看,农业与牧业间的相互依赖使国家容易统一。
【单选题】We ________in the neighborhood. [ ]
【单选题】I _ have no money on meyesterday. [ ]