what are you doing?l()a lett to my pen pal

问题描述:

what are you doing?l()a lett to my pen pal
还有考的知识点

what are you doing?l(am writing )a lett to my pen pal知识:用什么时态问,一般用什么时态回答.问句是现在进行时:BE +动词ING形式;固定用法 write ..to..给……写信.( 主语是I,故BE 用 am ; write 的现在分词是...