题目内容
12．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 |
分析 翻译：我不知道谁留的言．
解答 本题考查宾语从句，宾语从句应使用陈述语序，A和B是疑问语序，故排除；主句是过去时，从句也需用过去时，C是现在完成时，故排除；所以选D
点评 本题考查宾语从句，做此类题时，首先看从句是否采用陈述语序，其次主句若是过去时，从句也需采用相对应的过去时（客观事实除外）．
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