The manager has _______ to improve the working condition in the company.
Having __________ no-meat day would be a good way of encouraging ___________ low carbon life-style.
by a greater demand for green products, the food company has set higher standards to ensure the quality.
The little boy got rice to feed the chickens in the yard.
Not until all the fish died in the river how serious the problem of water pollution was.
When I was twenty, I had to before graduation and work in a clothes shop to help support my family.