GWD题求教. Thank you very much.

这几道题都作错了，请各位朋友帮忙解释一下。谢谢！

A recent review of pay scales indicates that CEO’s now earn an average of 419 times more pay than blue-collar workers, compared to a ratio of 42 times in 1980. 

1. that CEO’s now earn an average of 419 times more pay than blue-collar workers, compared to a ratio of 42 times
     
2. that, on average, CEO’s now earn 419 times the pay of blue-collar workers, a ratio that compares to 42 times
     
3. that, on average, CEO’s now earn 419 times the pay of blue-collar workers, as compared to 42 times their pay, the ratio
     
4. CEO’s who now earn on average 419 times more pay than blue-collar workers, as compared to 42 times their pay, the ratio
     
5. CEO’s now earning an average of 419 times the pay of blue-collar workers, compared to the ratio of 42 times
   

正确答案是C 我选的是E

By sucking sap from the young twigs of the hemlock tree, tree growth is retarded by the woolly adelgid, causing needles to change color from deep green to grayish green and to drop prematurely. 

1. tree growth is retarded by the woolly adelgid, causing needles to change color from deep green to grayish green and to drop
     
2. tree growth is retarded by the woolly adelgid, and this causes the color of needles to change from deep green to grayish green, and their dropping
     
3. the woolly adelgid retards tree growth, which causes needles to change color from deep green to grayish green, and dropping
     
4. the woolly adelgid retards tree growth, causing needles to change color from deep green to grayish green and to drop
     
5. the woolly adelgid retards tree growth, and this causes the color of needles to change from deep green to grayish green, and the their dropping
     

正确答案是D 我选的是A

GWD1-Q29:

Faulty voting equipment, confusing ballots, voter error, and problems at polling places have been cited by a new study of the 2000 United States presidential election, which estimated that they did not count 4 million to 6 million of the 100 million votes cast. 

1. Faulty voting equipment, confusing ballots, voter error, and problems at polling places have been cited by a new study of the 2000 United States presidential election, which estimated that they did not count 4 million to 6 million of the 100 million votes cast.
     
2. Citing faulty voting equipment, confusing ballots, voter error, and problems at polling places, a new study of the 2000 United States presidential election has estimated that 4 million to 6 million of the 100 million votes cast were not counted.
     
3. Citing faulty voting equipment, confusing ballots, voter error, and problems at polling places, 4 million to 6 million of the 100 million votes cast were not counted in the 2000 United States presidential election, a new study estimates.
     
4. A new study has cited faulty voting equipment, confusing ballots, voter error, and problems at polling places in estimating that 4 million to 6 million of the 100 million votes that were cast had not been counted in the 2000 United States presidential election.
     
5. A new study of the 2000 United States presidential election, citing faulty voting equipment, confusing ballots, voter error, and problems at polling places, has estimated 4 million to 6 million votes had not been counted of the 100 million votes cast.
     

正确答案是E 我选的是B

GWD3-Q33:

Almost a decade after New York State passed laws to protect patients by reducing the grueling hours worked by medical residents, twelve hospitals have been investigated by state medical officials, finding that all twelve consistently break the laws, many residents work longer than 24 hours straight, and that more than half the surgical residents work more than 95 hours a week.

1. twelve hospitals have been investigated by state medical officials, finding that all twelve consistently break the laws, many residents work longer than 24 hours straight, and that more than half the surgical residents work
     
2. an investigation by state medical officials of twelve hospitals have found all twelve consistently breaking the laws, that many residents work longer than 24 hours straight, with more than half the surgical residents working
     
3. an investigation of twelve hospitals by state medical officials has found that all twelve consistently break the laws, that many residents work longer than 24 hours straight, and that more than half the surgical residents work
     
4. twelve hospitals were investigated by state medical officials who found all twelve breaking the laws, with many residents working longer than 24 hours straight, and more than half the surgical residents work
     
5. an investigation by state medical officials has found that, of twelve hospitals, all twelve consistently break the laws, that many residents work longer than 24 hours straight, with more than half the surgical residents working
     

正确答案是E 我选的是C

GWD3-Q39:

Minivans carry as many as seven passengers and, compared with most sport utility vehicles, cost less, get better gas mileage, allow passengers to get in and out more easily, and have a smoother ride.

1. Minivans carry as many as seven passengers and, compared with most sport utility vehicles, cost less,
     
2. Minivans, which carry as many as seven passengers, compared with most sport utility vehicles, they cost less,
     
3. Minivans carry as many as seven passengers, in comparison with most sport utility vehicles, and have a lower cost, they
4. Minivans, carrying as many as seven passengers, compared with most sport utility vehicles, cost less,
     
5. Minivans, which carry as many as seven passengers, compared with most sport utility vehicles the cost is lower, and they
     

   正确答案是A 我选的是B

收到，十分感谢。