2) Government agencies have agreed to authorize insurance payments for the use of CAT scanners, recognizing that these machines are able to make hospital stays shorter and to reduce the frequency of exploratory surgery
a. are able to make hospital stays shorter and to reduce
b. may make the hospital stays shorter and make a reduction in
c. should shorten hospital stays and also make a reduction in
d. can shorten hospital stays and reduce
e. will shorten hospital stays, reducing

1)c

2)e

1) Few baskets made by Southern California Indians would have survived to the present had it not been for enthusiastic collectors at the turn of the century
a. had it not been for
b. unless there had been
c. without the fact that there were
d. were it not due to
e. except that there were

Government agencies have agreed to authorize insurance payments for the use of CAT scanners, recognizing that these machines are able to make hospital stays shorter and to reduce the frequency of exploratory surgery
a. are able to make hospital stays shorter and to reduce
b. may make the hospital stays shorter and make a reduction in
c. should shorten hospital stays and also make a reduction in
d. can shorten hospital stays and reduce
e. will shorten hospital stays, reducing

2 --> D

Thank you guys. I am sorry, the error was not underlined. Is there anyways you can provide a detailed explanation???

3) It is possible that future spacecraft will be slowly propelled through almost empty space within the solar system, not by jets of gas, but by the force of photons of sunlight pushing on thin plastic sails
a. It is possible that future spacecraft will be slowly propelled
b. It is possible for future spacecraft to be propelled slowly
c. Future spacecraft could be propelled slowly possibly
d. Future spacecraft could possibly slowly be propelled
e. It could be possible that future spacecraft be propelled slowly

3 --> A

Post the OAs for first two plz.

It is possible that future spacecraft will be slowly propelled through almost empty space within the solar system, not by jets of gas, but by the force of photons of sunlight pushing on thin plastic sails
a. It is possible that future spacecraft will be slowly propelled
b. It is possible for future spacecraft to be propelled slowly
c. Future spacecraft could be propelled slowly possibly
d. Future spacecraft could possibly slowly be propelled
e. It could be possible that future spacecraft be propelled slowly

1 - b

There should be a plural reference for baskets.. hence A and D are ruled out..

left with B,C, and E. E brings a exception .. C sounds too wordy .. therfore left with B

2 - D

from parallelism, D is the right choice

1 - A
2 - D

I just have the answer keys, I do not have the detailed explanations. So any differences in the answers will have to be discussed out on the forum

Problem #1 - A.

For Problem #2, choice E changes the meaning of the original sentence from "able" to "will". Try to key in on that and you will be able to knock some answer choices off. Also "will shorten hospital stays, reducing the frequency of surgery" does not follow logically. Perhaps if it was worded in reverse order. Answer is D.

Problem #3 - A