the best efforts of the desperate mother, the powerless baby elephant seemed to have no hope of escaping, until a team of conservation workers rushed to help.
A. In favor of
B. In spite of
C. In need of
D. In case of
网友回答
A. In favor of
(答案→)B. In spite of
C. In need of
D. In case of
解析：考查介词短语：A. In favor of赞同B. In spite of虽然C. In need of 需要， D. In case of如果，万一，表示条件，句意：虽然绝望的妈妈做了最大的努力，无力的小象好像没有希望逃脱，直到一群保护工作者跑来援助。选B。