题目内容:
The old lady has developed a _______ cough which cannot be cured completely in a short time.
A.perpetual
B.permanent
C.chroniC
D.sustaineD
参考答案:
答案解析:
The old lady has developed a _______ cough which cannot be cured completely in a short time.
A.perpetual
B.permanent
C.chroniC
D.sustaineD