While scientists are worried that humans are causing higher temperatures on the Earth, a Maryland man, Ace, thinks we can save the world by spraying(喷射)huge amounts of water into the air．
Ace told the McClatchy News Service that at least 1,000 places should be chosen to spray water．The water would be sprayed between 20 and 200 feet into the air．Thousands of tons of seawater would be sprayed for years at a time．
The 1,000 sites would be picked after more studies．They would be mostly in the Northern Hemisphere．Ace says he would avoid tropical(热带的)areas of the globe．He says water turns to rain too quickly in these areas for his plan to work．
The water would be changed into vapor．That process requires heat．The water vapor would rise above the Earth．The vapor would form clouds．The clouds would help in several ways．They would cool the Earth by reflecting sunlight．They would later turn into rains．The rains would provide another way of cooling the Earth．
Ace's plan has gotten some support from a limited scientific study．Kenneth Caldeira is a climate scientist．He works at the Carnegie Institution's Department of Global Ecology at Stanford University in California．Caldeira tested some of Ace's figures on a computer program．The computer model is used by top scientists to study global climate change．The model showed that the plan might work．
“More tests are planned in 2009．Ideas like Ace's should be considered carefully and with an open mind,” Caldeira said．“Every brilliant invention in the history of technology looked a little bit mad when first put forward．”
(1)
What's the purpose of Ace's plan?
[ ]
A．
To reduce air pollution．
B．
To make summer cooler．
C．
To offer dry areas more rain．
D．
To solve the problem of global warming．
(2)
According to Ace's plan, ________．
[ ]
A．
planes would be used to spray water
B．
it would be best to spray water on rainy days
C．
seawater would be sprayed high into the sky
D．
1,000 sites in the Southern Hemisphere would be chosen
(3)
Why wouldn't Ace spray water in tropical areas?
[ ]
A．
Water is changed into vapor too quickly．
B．
Water turns to rain too quickly．
C．
It is hard for vapor to form clouds．
D．
It is bad for local plants to have too much rain．
(4)
It seems that Caldeira ________．
[ ]
A．
takes Ace's plan seriously
B．
thinks Ace's idea too crazy
C．
doesn't believe the computer's result
D．
agrees to carry out Ace's plan right now
(5)
According to the passage, Ace can be best described as ________．
My father was 44 and knew he wasn't going to male it to 45．He wrote me a letter and hoped that something in it would help me for the rest of my life．
Since the day 1 was 12 and first read his letter, some of his words have lived in my beart．One it aways times out．“Right now, you are pretending to be a time-killer．But I know that one hay, you will do something great that will set you among the very best．”Knowing that my dad believed in me gave me permission to believe in myself．“You will do something great．”He didn't know what that would be, and neither did I, but at times in my life when I've felt proud of myself, I remember his words and wish he were here so I could ask．“Is this what you were talking about, Dad?Should I keep going?”
A long way frim 12 now, I realize hew would have been proud when I made any progress．Lately, thongn．I've come to believe he'd want me to move on to winat com next: to be nrood of and believe in, somebody else．It's time to start writing my own letters to my children．Our children look to us with the same unanswered question we had．Our kids don't hold back because they're afraid to fail．They're only afraid of failing us．They don't worry about being disappointed．Their fear－as mine was until my father's letter－is of being a disappointment．
Give your chikdren permission to succeed．They're witing for you to believe in them．I always knew way parents loved me．But trust my That elic will be more comlece, that love will be more real, and their belief in the nelces whi be greater if you write the words on their hearts;“Don't worry; you'll do something great．”Not having that blessing from their parents may be the only thing holding them back．
(1)
We learn from the text that the author ________．
[ ]
A．
lost his father when he was young
B．
worked hard before he read his father's letter
C．
asked his father permission to believe in himself
D．
knew execty at thing his father wanted him to do
(2)
What clis the hor tell us in the 3rd passgiaph?
[ ]
A．
Children need their parents'letters．
B．
Children are afraid to be disappointcd．
C．
His children's fear of failure held them back．
D．
His father's letter removed his fear of failing his parents．
