Theyyoungmanwearsglassesbecausehespendstoomuchtime

問題詳情：

 They 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

【回答】

B

知識點：非謂語動詞

題型：選擇題