1. When first to the market, these products enjoy great success.
A. introducing B. introduced
C. introduce D. being introduced
2. It was on Christmas eve ________ he paid a visit to his former English teacher.
A. that B. when C. on which D. which
3. We the cake ten parts, and each of us took one share.
A. divided; from B. separated; from C. divided; into D. separated; by
