SC's Question number - 857 , 858

857). There is speculation that increasing cold weather was what may have been responsible for the Anasazi move from Mesa Verde to sites in other canyons.

(A) that increasing cold weather was what may have been

(B) whether increasing cold weather was what was

(C) that increasingly cold weather was what had been

(D) whether increasingly cold weather may have been what was

(E) that increasingly cold weather may have been

858). There is substantial evidence that certain forms of solar energy either now or within a few years will be economically competitive with conventional sources of heat and power.

(A) either now or within a few years will be economically competitive with conventional sources of heat and power

(B) will either be economically competitive with conventional sources of heat and power within a few years or are so now

(C) will be economically competitive with conventional sources of heat and power either now or within a few years

(D) either are now economically competitive with conventional sources of heat and power or will be so within a few years

(E) are either now or will be within a few years economically competitive with conventional sources of heat and power


Answers:

857). OA - E - Speculation means Reasoning based on inconclusive evidence or supposition.hence may have been is getting along fine with speculation in the sentence. Further speculation that is the right idiom

A, B - incorrect - require increasingly (adverb) to modify cold (adjective), which is modifying weather (noun)

C - incorrect - Past perfect wrong. Present perfect continuous is required

D - incorrect - awkward - what was

858). OA - D

A - incorrect - ..now...will be

B, E - incorrect - either..or misplaced

C - incorrect - X will be competitive ....now....