My documents are always ______ out according to the contents(内容) and dates so that I have no trouble in finding them when they _______.
| A．set; are needed | B．put; need | C．sorted; are needed | D．written; need |
Having __________ no-meat day would be a good way of encouraging ___________ low carbon life-style.
| A．a; the | B．a; a | C．the; the | D．the; a |
by a greater demand for green products, the food company has set higher standards to ensure the quality.
| A．Driven | B．Being driven | C．To drive | D．Having driven |
The little boy got rice to feed the chickens in the yard.
| A．a piece of | B．a number of | C．a handful of | D．a loaf of |
Not until all the fish died in the river how serious the problem of water pollution was.
| A．did they realize | B．they did realize | C．had they realized | D．they had realized |
When I was twenty, I had to before graduation and work in a clothes shop to help support my family.
| A．come out | B．stay out | C．leave out | D．drop out |