2. 外语
  3. ______from Mary for a long time, Tom wrote to her again.

______from Mary for a long time, Tom wrote to her again.

admin2011-04-07  55
问题 ______from Mary for a long time, Tom wrote to her again.
选项 A、Having not heard
B、Not having heard
C、Haven’t heard
D、Not to have heard
答案B
解析 该题是语法结构题，考查动词非谓语形式中现在分词的用法。在该题中，现在分词要用完成形式，表示原因；表示否定意义的助动词not要放在分词前面。因此，根据题意和语法规则，选项B为最佳答案。
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