Though the old lady used her dog for a walk after supper now she has become used at hom

问题补充：

Though the old lady used her dog for a walk after supper ,now she has become used at home.

A. to take ,to staying

B. taking, to stay

C. to take, for staying

D. for taking, to stay

答案：

(答案→)A. to take ,to staying

B. taking, to stay

C. to take, for staying

D. for taking, to stay

解析：考察used to用法。这个词后面接名词或动名词表示习惯了某事。接动词原形表示过去常常做某事。根据题意，尽管这个老妇人过去常常在晚饭后呆着她的狗去散步，现在她还是习惯了呆在家里面。故选A。