He is writing a letter
He is writing a letter
He is writing a letter.(对a letter提问)
He is writing a letter in his study. (否定)
look he is (writing) a letter to his
He is writing a letter with a pen.和He wrote the letter in pe
He was writing a letter at that
He is writing a letter now,he()free in an hour.
The writer is in the room,he is writing a letter的合并句
Li Ming is writing a letter
writing my a letter brother is
She is writing a letter now
tom is writing a letter.the letter is _____ jim