题目

计算： ． 答案：原式=1+3-1+18×32 =1+3-1+2 =5 －What's the matter with the boy?He seems unhappy． －He was given a good lesson by his father．It was ________ computer games ________ took the boy a lot of time that he ought to have spent on his lessons． [　　] A． to have played; which B． having played; that C． playing; that D． played; hardly