well in the important exam , he came back home,andsmiling

The little girl having ______ such a big meal, the boy was consumed with curiosity about how much food ______by the world every day. [ ]

The _____ you work at it, the _____ progress(进步) you will make.

Could you tell me ________ at the meeting — Sorry, I don’t know. I was not at the meeting.

I lost________ key to the door yesterday.It was________ unlucky day for me.