One of the greatest problems facing the 21st century will be what to do with all the __________ produced in the world.
举一反三
- Today, the Terracotta Army is listed by UNESCO World _________ as one of the greatest archaeological sites in the world.
- Jonathan Swift is generally thought to be the greatest prose writer of the eighteenth century and one of the world’s finest novelists. （ ）
- What problems do the parents with only one child have?
- 60、What is characteristic of work in the 21st century?
- One of the serious problems facing us is（）of how to get enough manpower, A: that B: it C: which D: what