Jenny is always ________, never complaining about her poor health and other troubles．

Jenny is always ________, never complaining about her poor health and other troubles．

A.careless

B.grateful

C.cheerful

D.comfortable

答案及解析： C

解析：

考查词汇知识。grateful：感激的；

cheerful：愉快的；

振作的；

Jenny一直是很快乐的，她从不抱怨她的糟糕的健康和遇到的麻烦。