Mark the letter A, B, C or D to indicate the underlined part that needs correction in each of the following questions. 31. Please give me a few milk and some biscuits if you have any left. A. Please give B. a few C. some biscuits D. any left 32. My brother decided to buy in the morning a new bike, but in the afternoon he changed his mind. A. decided to B. in the morning a new bike C. in the afternoon D. changed 33. The study of these animals are truly fascinating, and many books have been written about them. A. these B. are C. many books D. written 34. Antarctic blue whales can be 100 foot long and weigh more than any dinosaur that ever lived. A. can be B. foot long C. more than D. ever 35. Many environmentalists fear that the earth will run out essential natural resources before the end of the twenty-first century. A. environmentalists B. that C. out essential D. before