能引起酮血症、酸血症的降血糖药是（）
A.正规胰岛素
B.精蛋白锌胰岛素
C.氯磺丙脲
D.格列本脲（优降糖）
E.苯乙双胍
参考答案：E
—Does your father _________newspapers every evening.
—Yes．he does．[ ]
A．watch
B．1ook
C．read
D．see
_______the safety of gas, the government has checked the city's gas supply system thoroughly. [ ]
A. To ensure
B. Ensuring
C. Having ensured.
D. To have ensured
