语音知识（共5小题，每小题1分，满分5分）
skim    

A．inspiration

B．organization

C．institute

D．possible

expand  

A．race.

B．decade

C．mineral

D．bacteria

worth   

A．thus

B．there

C．thunder

D． though

hunger  

A．underline

B．circulate

C．argue

D．super

comment 

A．reduce

B．focus

C．circulate

D．audience