There were dirty marks on her trousers __________she had wiped her hands.
| A．where | B．which | C．when | D．that |
Liu Xiang trained hard before the Asian Games in Guangzhou, and it __________. He won the gold medal in 110 meters' hurdles.
| A．worked out | B．paid off |
| C．marked out | D．got through |
I can't __________ to lose the papers because they contain a lot of confidential information.
| A．afford | B．offer |
| C．allow | D．admit |
The USA __________ on several countries in the past years, which reminds us that a nation must be strong if it __________.
| A．has started war; is to survive |
| B．started war; is going to survive |
| C．had started war; will survive |
| D．has started war; is about to survive |
Up to now, large quantities of food __________ to Africa to save the starving people.
| A．has been sent | B．have been sent |
| C．are sent | D．is sent |
We've just moved into a bigger house and there's a lot to do. Let's __________ it.
| A．keep up with | B．do away with |
| C．get down to | D．look forward to |