Did I lock the door when I went out— Yes, you did. I saw you _____ it.

下列各句中，没有语病的一句是(　　)

I prefer shutting myself in and listening to music all day on Sundays.— That’s _________ I don’t agree. You should have a more active life.

It’s hard to believe that Jack ________ have fought with the policeman. —Yes. If one ________ ask for trouble, it can’t be helped.

_______ do you write to your parents — Once a month.