The project is so designed that once _______ nothing can be done to change it．
| A．starts | B．having started | C．started | D．starting |
What you should remember is that we should always keep____ in an emergency .
| A．still | B．calm | C．quiet | D．silent |
Please___ all the numbers . Those numbers_____ 10,000.
| A．add to ; add up | B．add up ; add up to | C．add ; add to | D．add up to ; adds |
The little boy got punished_____ what he had done .
| A．because | B．because of | C．since | D．as |
The room______ window is still bright is our English teacher’s office .
| A．which | B．its | C．whose | D．that |
A few weeks later the first buildings ______ had been damaged were repaired .
| A．which | B．that | C．where | D．in which |