---Are the Smiths living in the house alone ?Yes although they have three sons of t

问题补充：

---Are the Smiths living in the house alone ?

--- Yes, although they have three sons, of them live with their parents.

A. neither

B. both

C. all

D. none

答案：

A. neither

B. both

C. all

(答案→)D. none

解析：句意：史密斯夫妇还独自住在那个房子吗？是的，尽管他们有三个儿子，但他们没有一个和父母住在一起。A两者都不B两者都C三者或三者以上都D三者或三者以上都不，根据句意，故选D