.Put it down，Tom. You mustn’t read _letter.

Every minute about ____ babies are born in the world, so the world’s population is increasing by _____million every year.

I’m sorry you didn’t have fun ______ your day off.[ ]

MacDonald who had spent much of his time graduating from college backpacking round Europe,decided last year to settle down.

People celebrate Chinese New Year __________ from house to house.[ ]