新概念英语第二册Lesson42练习题语法与词汇知识1Can you tell me the date the accident happened two months ago?Aon which Bwhat Con when Din which2He is just finishing fixing the radio,and that looks as if a hard jobAit must have been Bit was Cto be Dit must be3I wonder who broke the wine glass;it the cat for I took it out all dayAmust have been Bcant have beenCought not to be Dneednt have been4He escaped from this window b