单选题
I forgot ______ a letter to him, so I wrote to him just now.
A、
writing
B、
having wrote
C、
to have written
D、
to write
【正确答案】
D
【答案解析】
forget有两种用法：forget doing sth．忘记已经做过某事；forget todosth．忘记要做某事。根据句子意思，应该是我忘记要写信了，所以现在才给他写。
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