Question

【题目】I didn’t know _______________.

A. when would the train arrive B. who left the message

C. what has been done D. where could I get the book

Answer 1

【答案】B

【解析】句意：我不知道谁留下的信息。本句考察宾语从句的语序和时态，宾语从句要用陈述句的语序；，当主句是一般过去时态时，从句使用过去的某一时态。故选B。