Was it in the waiting room ______ only allows mothers-to-be to enter that you lost your wallet?

A. /         B. where    C. that      D. when

Was it in 2002 __________ he was still at middle school __________ the boy became expert at computer?

Was it in the train “ Harmony”, ______ is China’s first high-speed one, that John met with his foreign friend？

A. which                B. that             C. what         D. where

Was it in 2002 __________ he was still at middle school __________ the boy became expert at computer?

Was it in this very room ____ he made up his mind ____ he should break away from his family?

A. that; which  B. which; that C. which; which D. that; that