My friend, who on the International Olympic Committee all his life, is retiring next month.
| A．served | B．is serving | C．had served | D．has served |
4. To make members of a team perform better, the trainer first of all has to know their ____ and weaknesses.
| A．strengths | B．benefits | C．techniques | D．values |
3. She is on a special ______ to lose ______ weight.
| A．food, her | B．food, / | C．diet, her | D．diet, / |
20. When a stick is partly in a glass of water, it looks ________ it were broken.
| A．even though | B．although | C．as if | D．so that |
19. Have a little chicken, ______?
| A．don’t you | B．oughtn’t you | C．will you | D．shall you |
17. Besides our group ,we need 20 extra workers to get the work finished in time.
| A．around | B．about | C．or so | D．some |