New York is a nice old city I visited last summer.A. thatB. whereC. whichD. as

问题补充：

New York is a nice old city, I visited last summer.

A. that

B. where

C. which

D. as

答案：

A. that

B. where

(答案→)C. which

D. as

解析：考查定语从句。先行词是a nice old city,在定从 I visited last summer中作visited的宾语，且为非限制性定语从句，排除A,B；as有正如，正像之意，不符合句意，所以选C。