问题补充:
The young man wears glasses because he spends too much time the computer.
A. to work, in
B. working, on
C. to work, on
D. working, in
答案:
A. to work, in
(答案→)B. working, on
C. to work, on
D. working, in
解析:spend用于sb spend...on sth或者sb spend...in doing sth(in可以省略),spend的主语必须是人,可以指花费时间、也可以指花费金钱;在电脑上工作,用介词on,故选B。