31. What led the group to choose their topic?

• A.

  They were concerned about the decline of one species.

• B.

  hey were interested in the effects of city growth.

• C.

  They wanted to investigate a recent phenomenon.

32. The exact proportion of land devoted to private gardens was confirmed by

• A.

  consulting some official documents.

• B.

  taking large-scale photos.

• C.

  discussions with town surveyors.

33. The group asked garden owners to

• A.

  take part in formal interviews.

• B.

  keep a record of animals they saw.

• C.

  get in contact when they saw a rare species.

34. The group made their observations in gardens

• A.

  which had a large number of animal species.

• B.

  which they considered to be representative.

• C.

  which had stable populations of rare animals.

35. The group did extensive reading on

• A.

  wildlife problems in rural areas.

• B.

  urban animal populations.

• C.

  current gardening practices.

36. The speaker focuses on three animal species because

• A.

  a lot of data has been obtained about them.

• B.

  the group were most interested in them.

• C.

  they best indicated general trends.