October 1 1949 was the day the People’s Republic of China was founded．A. whichB. whenC.

问题补充：

October 1, 1949 was the day the People’s Republic of China was founded．

A. which

B. when

C. where

D. in which

答案：

A. which

B. when

C. where

(答案→)D. in which

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