问题描述:
Not until he retired from teaching three years ago( )having a holiday abroad.
A、he had considered B、had he considered C、he considered D、did he consider.选择哪一个,说明理由
A、he had considered B、had he considered C、he considered D、did he consider.选择哪一个,说明理由
问题解答:
我来补答展开全文阅读