After a few days together, they got to the point they could read each other’s thought.
A. which
B. that
C. where
D. when
网友回答
A. which
B. that
(答案→)C. where
D. when
解析：考察定语从句。当先行词是point，且定语从句中使用关系副词的时候，使用where,结合句意可知C正确。句意：在一起呆了几天以后，他们到了能相互理解对方的思想的地步。