用所给词的适当形式填空。每词限用一次
be, help, welcome, thank, excuse
【小题1】________ me, is this your pencil box?
【小题2】________ you for your letter.
【小题3】Bill, ________ these Bob’s books?
【小题4】________ to our school, Mary.
【小题5】Can you ________ me with my English?