SC's Question number - 659, 660

659). Some bat caves, like honeybee hives, have residents that take on different duties such as defending the entrance, acting as sentinels and to sound a warning at the approach of danger, and scouting outside the cave for new food and roosting sites.

(A) acting as sentinels and to sound

(B) acting as sentinels and sounding

(C) to act as sentinels and sound

(D) to act as sentinels and to sound

(E) to act as a sentinel sounding

660). Some analysts point out that because people are becoming accustomed to a steady inflation rate of four to five percent, businesses found that they could raise prices according to this amount without thereby provoking strong public reaction.

(A) found that they could raise prices according to this amount without thereby provoking

(B) found that they were capable of raising prices by this amount and not provoke

(C) find that they are capable of raising prices by this amount and not provoke

(D) are finding that they can raise prices by this amount without provoking

(E) are finding that they can raise prices according to this amount and will not thereby provoke


Answers:

659). (OG 10th Ques no - 3) - OA - B - Ques no 92

OE:
B - correct - preserves the sense of the original, uses the correct idiom, and observes the parallelism required among and within the three main verb phrases.
Because the verb phrases used to describe the bats' duties are governed by the phrase different duties such as, they should each be expressed in the present participial (or "-ing") form to parallel defending and scouting.

A, C, D, E - incorrect - violate parallelism by employing infinitives (to...) in place of participial phrases.

E - incorrect - the singular sentinel is not consistent with residents, and the omission of and distorts the meaning of the original.

660). OA - D - parallel - ....are becoming...are finding...without provoking...

A, B - incorrect - violating parallelism, wrong tense ...are becoming accustomed(present continuous) .... found(simple past)

C - incorrect - violating parallelism, wrong tense ...are becoming accustomed(present continuous) .... find(simple present)

E - incorrect - awkward and wordy according to this amount