The number of books in the bookshop is about 10,000 and a number of them________about science.
I ______believe everything ______ be free in 20 years.
Tara and her sister_____ quiet and they_____ sports.
Mr Wang didn’t come , so Mrs. Wang ______ .
We’re going to buy a new fridge______ two years.
I think there will be _____ people and ______pollution.