位于我国最北端的省级行政区是[ ]
A．黑龙江
B．海南
C．江苏
D．新疆
答案：A
--- Have you finished reading Jane Eyre?
--- No, I _________ my homework all day today.
A am doing B will do C has done D do
采用滚运法运输设备，比用滑运法（）。
A、省力
B、费力
C、不省力也不费力
