语音知识（共5小题，每小题1分，满分5分）
noise

A．purpose

B．course

C．choose

D．practise

heard

A．heart

B．dear

C．nearly

D．early

design

A．signal

B．foreign

C．strange

D．geography

chemistry

A．achieve

B．stomach

C．machine

D．chocolate

television  

A．decision

B．profession

C．question

D．condition