Read the following sentences. Decide whether the underlined appositives in each sentence are NI (necessary information) or EI (extra information) . (注意答案要填入大写字母) 1. Some of the customs of Easter, which is a Christian holiday , have pagan origins. 2. Before Christianity existed, people in northern and central Europe worshiped a goddess whom they called Eostre . 3. Eostre, which means east , was the goddess of spring. 4. Every spring, people who worshiped her held a festival to give thanks for the return of the sun's warmth. 5. They offered the goddess cakes that they baked for the festival . 6. These cakes were very similar to the hot cross buns that bakeries now sell at Easter . 7. Also, the custom of coloring eggs, which families do at Easter , came from ancient cultures. 8. Even the popular Easter Bunny, who brings chocolate eggs and other candy to children on Easter Sunday, has pagan roots.