In the activity, a few hours of “disability” gave us only a taste of the _______ both physically and mentally the disabled people should overcome.
Most people would agree that nuclear science should be developed to benefit the human beings_______ harm them.
Many new means__________ to prevent the river ____________.
I like _____ in the spring when the weather is warm and everything begins to grow.
Is it to hold the 2010 World Exhibition _______ makes Shanghai the focus of the world?
We can never expect________bluer sky unless we create___________less polluted world.