My elder brother wants to buy a computer so that he can carry it around when he travels.

问题补充：

My elder brother wants to buy a computer, so that he can carry it around when he travels.

A. removable

B. portable

C. possible

D. readable

答案：

A. removable

(答案→)B. portable

C. possible

D. readable

解析：本题的含义是我的哥哥想买个手提电脑，以便当他旅行的时候可以随声携带，portable computer表示手提电脑，故本题选B。