As his friends, we have made up our minds to do everything we can ___him get out of trouble.   

A．to help

B．help

C．helping

D．Helped

《中华人民共和国宪法》规定，地方行政建制和行政区划分为四级，即：

A．国家级、省级、市级、县级

B．省级、地级、市级、县级

C．省级、直辖市级、市级、县级

D．省级、地级、县级、乡级