Mike did the homework it took me.
A. onethird a time
B. onethird time
C. a onethird time
D. onethird the time
网友回答
A. onethird a time
B. onethird time
C. a onethird time
(答案→)D. onethird the time
解析：D 考察倍数表达法。句意：Tom做作业只用了我做作业三分之一的时间。分析句中结构可知one third三分之一，修饰名词time；空格后的it took me为定语从句，修饰Time，因此time表示特指，前面使用the。故D正确。