请教蓝皮语法6道

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请教语法6题
1.According to analyses,an alliance between three major personal computer companies and most of the nation's largest local telephone companies would enable customers to receive Internet
data over regular telephone lines________currently possible.
D.at much higher speeds than that
E.at speeds much higher than are
E为何对，D为何错

2.The Environmental Protection Agency's proposal to place restrictions _______ that the move will exacerbate the nation's fuel supply problems.
A.on both diesel fuel and diesel engines has sparked a counterattack by the oil industry,saying
C.on both diesel fuel and diesel engines has sparked a counterattack by the oil industry,which says
A为何错C为何对

3.Unlike a hurricane,which can be observed from within,a tornado is so small __________.
A.that such a study has not been practical
E.as to be impractical of study
E为何错

4._________:Alvin Toffler,one of the most prominent students of the future,did not even mention microcomputers in Future Shock,published in 1970.
D．It can hardly be said that educators are at fault for not anticipating the impact of microcomputer technology
E．The fact that educators are at fault for nor anticipating the impact of microcomputer technology can hardly be said
为何D对，E错

5.__________cases of Lyme disease in the United States.
D. New Jersey’s has one of the five highest numbers of reported
D为何对（numbers不是永远错吗？），还有这句话啥意思

6.Houseflies that hatch in summer live only about three ___________________ longer than six months.
A.weeks,but those that emerge in the cooler days of fall often live
D.weeks;then those that emerge in the cooler days of fall often live as long as or
D为何错




谢谢赐教，SAVE RP FOR GMAT