title: 单项选择84.we'llgotoseemrgreen.heiso 
desc: 84. we'll go to see mr green. he is our english teacher ______ s ______.
  a. what, climb b. who, climbing c. when, climbs d. where, climbed
answer: 选B
  定语从句.
  先行词是teacher,是人,所以引导词用who
  love climbing 动词后面跟动名词
  意思是喜欢攀登