he wrote a letter to his friend yesterday afternoon(用from5:00 to 5:40改写) he___ ___a letter tohis friend from5:00 to 5:40 yesterday afternoon

问题描述:

he wrote a letter to his friend yesterday afternoon(用from5:00 to 5:40改写) he___ ___a letter to
his friend from5:00 to 5:40 yesterday afternoon

答案是 was writing
加油!不明白再问!