西医治疗，内服选用：
A．皮质类固醇激素B．免疫抑制剂C．四环素D．菸酰胺E．磺胺类
参考答案：A
Fred _____ many football boots. But this pair of boots _____ the nicest. [ ]
A. has, are
B. has, is
C. there are, are
D. there are, is
His report was so exciting that it was interrupted by applause(鼓掌).
A．constantly
B．constant
C．seldom
D．never
