亚述位于美索不达米亚平原的()部
A、东
B、南
C、西
D、北
参考答案:D
用反证法证明:“a>b”,应假设为______.
—Tom is ill in hospital.
—Oh, I didn't know about that._________, I'll go and see him. [ ]
A. If so
B. If anything
C. If any
D. If ever