I have a letter to write这句中的不定式动词为不及物动词 是指哪个词?是指TO WRITE么?到底什么时候要加TO呢?

I (w )a letter and(s )many emails to my parents.They were(i ). I have a letter ------ Areplying B to reply C to reply toDto answer to 同义句转换 W wrote a letter to my mother yesterday.I () () my mother yesterday. Do you have a pen I want to ( ) a letter to my parents I want to write a letter.Can I have some ( ) ( 怎么填 I want to write a letter. Can I have some（ ）（ ）. i want to write a letter . can i have same _ _ I want to write a letter to Adarn.Do you have his block?的意思 I have got a letter to be posted,I have got a letter posted 两句话,哪个对,还是都对? It's a long and difficult word.I have forgotten which letter to begin.改错 I have another letter to write(同义句)I have_________ _________ letter to write Which letter is a kind of drink and which letter is difficult to understand?A：T AND YB：W AND ZC：S AND XD：I AND N Which letter is a drink?Whick letter is a drink?Find a letter to continue the series.Hink:These look like letters,but think of them as numbers.=( )N W H O I I i want to write a letter ___mother look,lingling is w()a letter to her pen pai A:___you __ a letter B ：Yes ,I have ___a letter to my mum .A Did ,write,wrote B Do,write,wrote I with to have this letter sent by fax. I want to write a letter.Can I have some ____ _____. 根据句意,填入合适的单词.