考点：词汇填空。
B)根据句子意思，用括号中所给单词的适当形式填空，并将答案填写在答卷纸标号为46-50的相应位置上。
46. The story happened about two (century) ago.
47. Besides the funny actors in the film, the story (it) is really interesting.
48. In China, the number “eight” is thought to be a (luck) number by many people.
49. We can make a big difference to the earth by (do) small changes.
50. The elephant is seriously ill. It is (die).
【答案】 46.centuries 47.itself 48.lucky 49.doing 50.dying
