( )29. The weather in Beijing is cooler than ________ in Guangzhou.

问题描述:

( )29. The weather in Beijing is cooler than ________ in Guangzhou.
  A. this B. it C. that D. one
为什么选C
给详细解释

此时的that指代前文中的不可数名词weather,若前文中的名词为复数形式,则用those指代.为什么不选AA 不能指代不可数名词。