(时间：100分钟；满分：120分)
Ⅰ.完形填空(共15小题；每小题2分；满分30分)
Life in the twenty－first century will be very __1__.Many changes will take place, but__2__ will the changes be.
The population is growing __3__．There will be many __4__in the world and most of them will live __5__than people in the twentieth century.
