Is this research center the foreign guests visited last week? A. that B. which C. where D

问题补充：

Is this research center the foreign guests visited last week?

A. that

B. which

C. where

D. the one

答案：

A. that

B. which

C. where

(答案→)D. the one

解析：可联系答案网客服索取此答案。