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参考答案：错
— I've had a stomachache for two weeks.
— You ____ to the doctor when it started. [ ]
A. must go
B. should go
C. ought to have gone
D. might have gone
儿童原发性肺结核特点是
A．症状明显B．病变开始以渗出性改变为主C．易于通过支气管、淋巴道播散D．起始病灶多位于肺尖部
