the airplane flew faster than the speed that the earth goes around定语从句这句话中先行词speed 在从句中做什么成分,应该放在从句中

题目

the airplane flew faster than the speed that the earth goes around定语从句这句话中先行词speed 在从句中做什么成分,应该放在从句中哪个位置

答案

从句the earth goes around不缺少基本成分,所以如果我们自己填引导词的话应该填关系副词或“介词+which/whom”.没有跟the speed对应的关系副词,所以只能填“介词+which”,“以...速度”介词应该用at,所以从句就成了at which the earth goes around.
如果原句没有抄错的话,那只能把that当作关系副词.
that有时可作为关系副词,且可省略.
eg: This is the first time (that) I have been here.
I don't like the way (that / in which) he speaks to his mother.