【题目】Is this research center_______ you visited the modem equipment last year?
A.where
B.that
C.the one that
D.the one where

【答案】D
【解析】考查定语从句。句意：这是你们去年参观过的那个有现代设备的研究中心吗？_______ you visited the modem equipment last year?是限制性定语从句，修饰先行词the one，在从句中作地点状语，故选D。