Stepping into a pool of water is common enough, but who could ever imagine stepping into a pool of fish? In February of 1974, Bill Tapp, an Australian farmer, saw a rain of fish that covered his farm. How surprised he must have been when he heard many fish hitting against his roof!

　　 What caused this strange occurrence? This is a question that had long puzzled people who study fish. The answer turned out to be a combination of wind and storm.

　　When it is spring in the northern part of the world, it is fall in Australia. Throughout the autumn season, terrible storms arise and rains flood the land. The strong winds sweep over Australia like huge vacuum cleaners, collecting seaweed, pieces of wood, and even schools of fish. Strong winds may carry these bits of nature for many miles before dropping them on fields, houses, and astonished people.

　　Although they seem unusual, fish-falls occur quite frequently in Australia. When Bill Tapp was asked to describe the scene of fish, he remarked, “They look like millions of dead birds falling down.” His statement is not surprising. The wonders of the natural world are as common as rain. Nature, with its infinite wonders, can create waterfalls that flow upward and fish that fall out of the sky.

　　56. What is this passage about?

　　A. A sad story. 　　　　　　　　　　　　B. A rain of fish.

　　C. Australia’s northern part.　　　　　D. The damage done by floods.

　　57. Fish-falls occur in Australia_________ .

　　A. quite often 　　　　　　B. on large farms

　　C. only in winter　　　　　D. when the air is calm

　　58. It is a known fact that ________.

　　A. one should watch where one steps

　　B. Bill Tapp is a scientist who studies farming

　　C. the natural world can never create waterfalls that fall upward

　　D. the seasons in the southern part are different from those in the northern part

 　59. The word “infinite” is closest in meaning to _________.

　　A. easy 　　　B. difficult 　　　C. countless 　　　D. dangerous

Stepping into a pool of water is common enough, but who could ever imagine stepping into a pool of fish? In February of 1974, Bill Tapp, an Australian farmer, saw a rain of fish that covered his farm. How surprised he must have been when he heard many fish hitting against his roof!

　　 What caused this strange occurrence? This is a question that had long puzzled people who study fish. The answer turned out to be a combination of wind and storm.

　　When it is spring in the northern part of the world, it is fall in Australia. Throughout the autumn season, terrible storms arise and rains flood the land. The strong winds sweep over Australia like huge vacuum cleaners, collecting seaweed, pieces of wood, and even schools of fish. Strong winds may carry these bits of nature for many miles before dropping them on fields, houses, and astonished people.

　　Although they seem unusual, fish-falls occur quite frequently in Australia. When Bill Tapp was asked to describe the scene of fish, he remarked, “They look like millions of dead birds falling down.” His statement is not surprising. The wonders of the natural world are as common as rain. Nature, with its infinite wonders, can create waterfalls that flow upward and fish that fall out of the sky.

　　56. What is this passage about?

　　A. A sad story. 　　　　　　　　　　　　B. A rain of fish.

　　C. Australia’s northern part.　　　　　D. The damage done by floods.

　　57. Fish-falls occur in Australia_________ .

　　A. quite often 　　　　　　B. on large farms

　　C. only in winter　　　　　D. when the air is calm

　　58. It is a known fact that ________.

　　A. one should watch where one steps

　　B. Bill Tapp is a scientist who studies farming

　　C. the natural world can never create waterfalls that fall upward

　　D. the seasons in the southern part are different from those in the northern part

　　59. The word “infinite” is closest in meaning to _________.

　　A. easy 　　　B. difficult 　　　C. countless 　　　D. dangerous

WASHINGTON---At least four more U.S. air-traffic controllers are caught nodding off on the job at three separate airports across the nation, the government said Wednesday.

The controller working alone in the tower fell asleep and was out of communication for 16 minutes while a medical flight carrying a patient was trying to land at about 2 A.M. Wednesday at Reno-Tahoe International Airport in Nevada, the Federal Aviation Administration (FAA) said in a statement.

The FAA announced that it is also investigating a controller who fell asleep Monday at Boeing King County International Airport in Seattle and two controllers who were unresponsive at McGhee Tyson Airport in Knoxville, Tennessee on Feb.19.

“I am sick of this,” Senate Commerce, Science and Transportation Chairman Jay Rockefeller, a West Virginia Democrat, said in a statement. “We can’t have a system where some of the people responsible for safety are asleep at the switch.”

As the incidents pile up, sleep experts say it demonstrates that the agency faces a systemic issue with the thousands of people expected to work through the night in safety-critical jobs. Scientific research shows that workers on midnight shifts make more errors because it is so difficult for the body to adapt to sleeping during the day, they say.

The agency will add an extra controller at the 27 towers staffed with one worker on the midnight shift, the FAA statement said.

Representative John Mica, the Florida Republican who chairs the House transportation committee, criticized the decision to add controllers. “Only in the federal government would you double up on workers, averaging $161,000 per year in salary and benefits, that aren’t doing their job,” Mica said in a statement. Mica has pushed legislation that would allow as many as 90 smaller airports to switch from federal to private controllers.

“People have known these problems with fatigue（疲劳）have existed for years,” said John Goglia, a Boston-based aviation safety consultant. “They’re now showing up. The FAA is admitting they exist. Now the FAA needs to work on it.”

The four controllers in Nevada, Seattle and Texas have been suspended(暂时停职) during the investigations, the FAA said.

40. The underlined part “double up on workers” means “______”.

A. add two more workers　　　　　　　　　　　　　　　　 B. staff two workers at a post

C. settle two workers in a double room　　　　　　　 D. give the workers double pay

41. According to John Goglia, fatigue problem ______.

A. is a known potential danger　　　　　　　 B. has never appeared before

C. is common for day-time shift workers　　　 D. seldom shows up at night

42. Which statement is true?

A. A controller fell asleep without communication for 16 minutes in Knoxville, Tennessee.

B. A medical flight carrying a patient failed to land with the controller asleep.

C. Jay Rockefeller pays little attention to sleeping at the switch.

D. Mica refused to support the decision to staff more controllers on the midnight shift.

43. We can infer from the passage that ______.

A. All the controllers in the US were working alone while they were on duty

B. The incidents are rooted in fatigue problems and those on midnight shifts need an extra nap

C. In the U.S. , thousands of people expect to work through the night in safety-critical jobs

D. The agency has added an extra controller at the 27 towers