Is this research centre is full of modern equipment you always mention.
A. where
B. that
C. the one that
D. the one where
网友回答
A. where
B. that
(答案→)C. the one that
D. the one where
解析：这题考查句子成分，this research centre是主语，is是系动词，横线后面是句子，所以句子缺少表语，填the one代替the research centre，另外定语从句中缺少主语所以关系代词用that而且不能省。选C。