Tom was so wild about computer games that he would stay online for ten hours every dayA.

问题补充：

Tom was so wild about computer games that he would stay online for ten hours every day．

A. in the end

B. in particular

C. on end

D. on purpose

答案：

A. in the end

B. in particular

(答案→)C. on end

D. on purpose

解析：句意：汤姆如此地热衷于电脑游戏以致于他每天在线连续10个小时。A．in the end最后，终于； B．in particular尤其，特别； C．on end 连续； D．on purpose故意地。

根据句意故选C。