People gather where to watch large four-legged animals run? Choose the most suitable option to answer the above question. Options：  A. populated areas  B. opera  C. race track  D. roadblock  E. at the foot path
C

Bill sits down on a whoopee cushion, what sound does he make when he sits? Choose the most suitable option to answer the above question. Options：  A. fall asleep  B. flatulence  C. sigh of relief  D. medium  E. comfort
B

On what continent would you find a lemur? Choose the most suitable option to answer the above question. Options：  A. hole  B. australia  C. cage  D. wilderness  E. forrest
B