治疗溶血性链球菌引起的感染首选：
A．庆大霉素B．青霉素GC．红霉素D．氨苄青霉素E．头孢曲松(第三代头孢)
参考答案：B
______ the task in time, we had to work late into the night.
A．Finished
B．Finishing
C．To finish
D．Having finished
对季节性安全大检查查出的问题应制定（）。
