London last year is a nice old city.A. that I visitedB. which I visitedC. I visitedD. wh

问题补充：

London, last year, is a nice old city.

A. that I visited

B. which I visited

C. I visited

D. where I visited

答案：

A. that I visited

(答案→)B. which I visited

C. I visited

D. where I visited

解析：考查的是非限制性从句，防止误选C.