It's 6: 30. It's time to g____ up.
兼跨A和B所在地势阶梯,有长江、黄河两大河流流经,且五种基本地形类型齐全的省级行政区是( )
如果你用地球仪演示地球的公转,在演示过程中,操作错误的是( )
____were the Smiths____at 8:00 p.m. yesterday?