section 16 17的几个问题

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section 17

10.   During the 1980’s approximately $50 billion in private investment capital is estimated to have left Mexico and added to the strain on the country’s debt-ridden economy.

(A) During the 1980’s approximately $50 billion in private investment capital is estimated to have left Mexico and added

(B) During the 1980’s it is estimated that approximately $50 billion in private investment capital left Mexico and added

(C) It is estimated that there was approximately $50 billion in private investment capital that left Mexico during the 1980’s and added

(D) It is estimated that during the 1980’s approximately $50 billion in private investment capital left Mexico, adding（D）

(E) Approximately $50 billion in private investment capital is estimated as having left Mexico during the 1980’s, adding

D   请问什么时候用AND　　什么情况下又用ING　形式？？

section 16

18.   Judge Bonham denied a motion to allow members of the jury to go home at the end of each day instead of to confine them to a hotel.

(A) to allow members of the jury to go home at the end of each day instead of to confine them to

(B) that would have allowed members of the jury to go home at the end of each day instead of confined to

(C) under which members of the jury are allowed to go home at the end of each day instead of confining them in

(D) that would allow members of the jury to go home at the end of each day rather than confinement in（E）

(E) to allow members of the jury to go home at the end of each day rather than be confined to

开始我选了D　答案是E　　为什么？？

12.   Because of the enormous research and development expenditures required to survive in the electronics industry, an industry marked by rapid innovation and volatile demand, such firms tend to be very large.

(A) to survive

(B) of firms to survive

(C) for surviving

(D) for survival（B）

(E) for firms’ survival

B　为什么是答案？？

10.   During the early years of European settlement on a continent that was viewed as “wilderness” by the newcomers, Native Americans, intimately knowing the ecology of the land, were a help in the rescuing of many Pilgrims and pioneers from hardship, or even death.

(A) Native Americans, intimately knowing the ecology of the land, were a help in the rescuing of

(B) Native Americans knew the ecology and the land intimately and this enabled them to help in the rescue of

(C) Native Americans, with their intimate knowledge of the ecology of the land, helped to rescue

(D) having intimate knowledge of the ecology of the land, Native Americans helped the rescue of（C）

(E) knowing intimately the ecology of the land, Native Americans helped to rescue

C　　G中help 不是不能＋to do 吗？？

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