Why didn’t you know it was raining outside? 　　　　— Oh, I was _____ in thought at that time. [ ]

Mum, I’m hungry. Can I eat _______ bread— Of course you can.

Must I clean up the classroom right now, Miss Green– No, you ______.

How I regret making the stupid mistake!— YesIyour doing it another way at that time, but in vain

—When is Jack going to finish writing that program?—I don’t know ______ day in and day out.[ ]