题目内容:
The old lady has developed a _______ cough which cannot be cured completely in a short time.
Aperpetual
Bpermanent
Cchronic
Dsustained
答案解析:
The old lady has developed a _______ cough which cannot be cured completely in a short time.
Aperpetual
Bpermanent
Cchronic
Dsustained