Question

I didn’t know ______. A．when would the train arrive B．where could I get the book C．what

I didn’t know ______. A．when would the train arrive B．where could I get the book C．what has been done D．who left the message

Answer 1

D

试题分析：句意:我不知道谁留的言。根据句意可知，这里考查的是宾语从句，从句中应该使用陈述语序，故A和B不对；这个题干中谓语动词部分didn’t know 使用的是一般过去时态，故宾语从句中也应该用过去时态，故C不对，它是现在完成时。故选D。