Peter told us the work would be finished by next month personally I doubt very much.A. t

问题补充：

Peter told us the work would be finished by next month, personally I doubt very much.

A. that

B. when

C. which

D. it

答案：

A. that

B. when

(答案→)C. which

D. it

解析：考查定语从句。Which指代前面一句话的内容在定语从句中做主语。故C正确。