[求助]XDF语法(蓝皮书)里的几道问题

1. Several studies have found that the coronary patients who exercise most actively have half or less than half the chane of dying of a heart attack as those who are sedentary.

A. have half or less than half the chance of dying of a heart attack as those who are sedentary

B. have half the chance, or less, of dying of a heart attack than those who are sedentory do

C.have half the chance that they will die of a heart attack, or less, than those who are sedentary do

D.are at least fifty percent less likely to die of a heart attack as those who are sedentary

E.are at least fifty percent less likely than those who are sedentary to die of a heart attack

Answer: E.  But what's wrong with (B)?

2. Most nations regard their airspace as extending upward as high as an aircraft can fly; no specific altitude, howeve, has been officiallly recognized as a boundary.

A. as extending

B. as the extent

C. to be an extent

D. to be an extension

E. to extend

Answer: A.  Need detailed explanation. Thx.

3.Charlotte Parkins Gilman, a late nineteenth-century feminist, called for urban apartment houses including child-care facilities and clustered suburban houses including communal eating and social facilities.

A.including child-care facilities and clustered suburban houses including communal eating and social facilities

B.that included child-care facilities, and for clustered suburban houses to include communal eating and social facilities

C.with child-care facilities included and for clustered suburban houses to include communal eating and social facilities

D.taht included child-care facilities and for clustered suburban houses with communal eating and shocial facilities

E.to include child-care facilities and for clustered suburban houses with communal eating and social facilities included

Answer: D. Why not (A)?

4.Alaska regularly deposits some of its profits from the sale of oil into a special fund, with the intention to sustain the state's economy after the exhaustion of its oil reserves

A.fund, with the intention to sustain the state's economy after the exhaustion of its oil reserves.

B.fund, the intention of which is to sustain the state's economy after they have exhausted their oil reserves.

C.fund intended to sustain the state's economy after oil reserves are exhausted

D.fund intended to sustain the state's economy after exhausting its oil reserves

E.fund that they intend to sustain the state's economy after oil reserves are exhuasted

Answer: C. Why not (D)?

If anyone helps..thanks a lot...

3.Charlotte Parkins Gilman, a late nineteenth-century feminist, called for urban apartment houses including child-care facilities and clustered suburban houses including communal eating and social facilities.

A.including child-care facilities and clustered suburban houses including communal eating and social facilities

B.that included child-care facilities, and for clustered suburban houses to include communal eating and social facilities

C.with child-care facilities included and for clustered suburban houses to include communal eating and social facilities

D.taht included child-care facilities and for clustered suburban houses with communal eating and shocial facilities

E.to include child-care facilities and for clustered suburban houses with communal eating and social facilities included

Answer: D. Why not (A)?

CPG called for 1) clustered suburban houses 2) clustered suburban houses

1) clustered suburban houses --included child-care facilities

2) clustered suburban houses -- included communal eating and shocial facilities

in A) there is no paralle