将句子用关系代词或副词连成含定语从句的复合句. This is a pen.I wrote the letter with this pen.
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将句子用关系代词或副词连成含定语从句的复合句。
This is a pen.I wrote the letter with this pen.
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答案:
解析:This is the pen(that/which)I wrote the letter with. |