30．They are letting us use their computer, and __________ we are giving them the results of our research.

　　 A. in charge　　　　　　 B. in place　　　　 C. in return　　　　　　 D. in a row

29．There was a murder in one of the poorest suburbs in the city the other day. Now the police are turning the whole house upside down __________ of clues.

　　 A. in want of　　　　　 B. in search of　　　　 C. in favor of　　　　　 D. in memory of

28．The local government has been accused of not responding __________ to the needs of the homeless in the flood-stricken area.

　　 A. hopelessly　　　　　 B. appropriately　　　　 C. needlessly　　　　　 D. constantly

27．There is no doubt that as we get older, our bodies become less __________ at burning calories.

　　 A. energetic　　　　　　 B. effective　　　　　　 C. abundant　　　　 D. efficient