It is the day October 1st, 1949 _____ the People’s Republic of China was founded _____ we’ll never forget.

It is the day October 1st, 1949 _____ the People’s Republic of China was founded _____ we’ll never forget.

   A. that; that      B. that; when     C. in which, that     D. when, that

It is the day October 1st, 1949 _____ the People’s Republic of China was founded _____ we’ll never forget.

1. A.
   that; that
2. B.
   that; when
3. C.
   in which, that
4. D.
   when, that

It is the day October 1st, 1949 _____ the People’s Republic of China was founded _____ we’ll never forget.

   A. that; that      B. that; when     C. in which, that     D. when, that

It is the day October 1st, 1949 _____ the People’s Republic of China was founded _____ we’ll never forget.

   A. that; that      B. that; when     C. in which, that     D. when, that