Where is your pen pal from?这边用的是is.那为什么What are your sister

Where is your pen pal from?这边用的是is.那为什么What are your sister 第一题是where is your pen pal from? Where is your pen pal from?的回答 Where is your pen pal from?他的同义句 为什么是Is your pen pal from Australia?不是Deso your pen pel from Where's your pen pal from?这句话pal为什么不用Friend?pen为什么用pen? 为什么是Where does your pen pal come from,而不是Where do your pen p where is your pen pal from?这句话各单词的词性,在句子中的成分? where is your pen pal from?的同义句是什么啊 关于英语的问题Where is your pen pal from? 这句英语中的 is 是第三人称而your是第而人称 is she your sister() your pen pal?she is my new pen pal. 英语中be from 和come from 的用法有何不同?比如 Where is your pen pal from?