【题目】________ toothache, the old man felt very bitter, having no good sleep.
A.Not being rid of
B.Not ridding of
C.Not rid of
D.Not having rid of

【答案】C
【解析】句意：没有摆脱牙痛，这个老人感觉很苦，睡不好觉。rid 常构成rid sb of sth 和 be rid of sth，这里rid和逻辑主语the old man 之间是动宾关系，所以用过去分词。