It is the customers’ needs that has made chain stores so popular in big cities in China.
As there is less and less coal and oil, scientists are exploring new ways of making use of ____ energy, such as sunlight, wind and water for power and fuel.
In the future, senior citizens will be able to go anywhere using high-tech cameras _______ to their head.
As he works in a remote area, he visits his parents only ______.
Don’t mention that at the beginning of the story, or it may _____ the shocking ending.
With two extra floors built, this hotel can ________ more people than before.