In 2007, when my daughter was seven years old, we would brush our teeth together every night as part of our daily ritual. To conserve water, we would turn off the faucet after wetting our brushes and turn it back on only to rinse.One night, I didn’t turn off the water fast enough to her (1).She turned off the faucet, made an angry face at me, and growled, “Turn off the water, Daddy. The scientists need time.”The late Nobel Laureate Richard Smalley highlighted the (2) 10 problems for the next 50 years. His list, in (3) order of importance, was: energy, water, food, environment, poverty, terrorism and war, disease, education, democracy, and population. Water is going to be the greatest challenge for humanity.But the water problem is (4). First, unlike coal and oil, water cannot be (5). Second, water is (6) with every other sector of society. Third, while water demands are growing, climate change is intensifying droughts and floods and water supplies are (7).There are solutions, such as building water-transfer aqueducts, hydroelectric dams, and desalination plants. But they may be incredibly (8). Research budgets have prioritized energy, defense, and health while mostly ignoring water, even though (9) water would help our energy, defense, and health problems. It will take time for scientists to find affordable solutions to the water problem. Before that, everyone should do his or her bit to (10) water.选词填空:A)intensify B)complicated C)subsequent D)fixing E)outcome F)conserve G)strategic H)expensive I)contention J)liking K)replaced L)intertwined M)fluctuating N)top O)descending