选词填空

My aunt has got a pet dog. ______ is black and white.
Lily’s new camera is very good. I want to buy ______.

Here are some pens. Which ______ would you like?
There are some children over there. Some of ______ are from Hongkong.

I can’t go shopping with you. I have much _______ to do today.
I think it is a good ______ for you.

I usually go to school ______ bike.
You can visit the city ______ the bus.

People will have long holidays ______ machines will do heavy and difficult jobs.
Machines will do heavy and difficult jobs, ______people will have long holidays.