问题补充:
Is this research centre is full of modern equipment you always mention.
A. where
B. that
C. the one that
D. the one where
答案:
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。