The man showed us so heavy a stone ________ no man can lift.
A. that B. as C. which D. and
The man showed us so heavy a stone ________ no man can lift.
A. that B. as C. which D. and
B
当先行词前有so时，用as引导定语从句，as在从句中作主语或宾语。假若在lift后加上it，答案就是that了，请想想这是为什么。