For each blank in the following passage, choose the best answer from the choices given below. Mark your answer on the Answer Sheet by drawing with a pencil a short bar across the corresponding letter in the brackets. For most kinds of activities, a large group of people can accomplish more and have more fun than one person alone. For example, politicians, businessmen, workers, and【B1】criminals know that they must join organizations in order to be【B2】. Since there is usually strength in numbers, labor unions have a more【B3】influence on wages and company policy than individual workers【B4】. A person may also belong to social clubs and athletic teams【B5】he or she can meet other people who are interested in the same activities.【B6】you have a hobby, such as playing chess, collecting coins or stamps, or playing a musical instrument, you should join a club which has【B7】meetings to talk about your activity; the other【B8】will help you learn more about it. Of course, a group must be well【B9】, or it might be a failure. All the members should work together on projects and choose good leaders to【B10】their activities. In this way, the organization will benefit everyone in it.
【答案解析】解析：首先这是个定语从句，what是错误选项。at which和in which不正确是因为介词错用。which指代 club和team，搭配上介词后分别应该是at a club和on a team。B和D项都不能同时指代两个。where为关系副词，表示"在那里"，可以同时指代两个地点。故C是正确答案。