25. The American Civil War lasted four years _____the North won in the end.
| A．after | B．before | C．when | D．As |
David Beckham suffered a serious injury this weekend ________ playing for AC Milan, and it appears the soccer star will miss the World Cup．
| A．while | B．if | C．where | D．whether |
All her time _______ research, the scientist has no time for films．
| A．devoted to do | B．is devoted to doing | C．devoting to doing | D．devoted to doing |
She’s too thin．She ________ gain some weight but she ________ too little．
| A．would; ate | B．will; eats | C．would; eats | D．will; ate |
He shut the window with such force ________ the glass broke．
| A．which | B．that | C．as | D．when |
—Did you know any Chinese before you arrived in Beijing?
—Never ________ it, actually．
| A．had I learned | B．have I learned |
| C．I have learned | D．I had learned |