How many pens are ___________on the desk?
- The World Cup_______ once every four years.- So the next World Cup will be in 2018.
How terrible the air is now! We_______ have a blue sky.
- Did you see the sports star last Sunday?- No. I was too late. When I rushed to the hall, it was_______.
I'm not sure whether I can hold a party in the open air, because it_______ the weather.
- Millie, could you give me some advice? I don't know_______.- Why don't you wear this red shirt?