1. are
Are you sure?
Work and play are words used to describe the same thing under differing conditions.
I went on vacation, and my plants are still alive.
In legal documents, difficult words and phrases are often used.
Hummer limousines are the ultimate symbol of conspicuous consumption.
All great men are dead and I am not feeling too well myself.
The summit talks are to be broadcast simultaneously throughout the world.
China and Mongolia are separated by the Great Wall of China.
Explain exactly what the reasons are.
Small cars are very economical because of their low fuel consumption.
Her sewing basket, dresser drawers and pantry shelves are all systematically arranged in apple-pie order.
It is said that Japanese people are kind to people they know, but rather cold to those they don't.
Excuse me, I have to get to Barcelona. Are there any flights today?
Cats are like girls. If they talk to you it's great, but if you try to talk to them, it doesn't go so well.
Most computers made today are equipped with multi-core processors.