The dog may be a good companion for the old. the need to take it for walks may be a disa

问题补充：

The dog may be a good companion for the old. , the need to take it for walks may be a disadvantage.

A. Besides.

B. However

C. Therefore

D. Instead.

答案：

A. Besides.

(答案→)B. However

C. Therefore

D. Instead.

解析：考查连词。前一句话有good，后面一句话有disadvantage，前后两句话有转折关系，所以选择

however。句意：狗也许是老年人的好陪伴。然而需要带着狗去散步时也许有不便。