SC's Question number - 997, 998

997). Studying the fruit fly, a household nuisance but a time-honored experimental subject, has enabled the secrets of how embryos develop to begin to be unraveled by scientists.

A) Studying the fruit fly, a household nuisance but a time-honored experimental subject, has enabled the secrets of how embryos develop to begin to be unraveled by scientists.

B) By the study of the fruit fly, a household nuisance and also a time-honored experimental subject, it was possible for the secrets of how embryos develop to begin to be unraveled by scientists.

C) By studying a household nuisance but a time-honored experimental subject, the fruit fly enabled scientist to begin to unravel the secrets of how embryos develop.

D) By studying the fruit fly, a household nuisance and also a time-honored experimental subject, the secrets of how embryos develop are beginning to be unraveled by scientist.

E) The study of the fruit fly, a household nuisance but a time-honored experimental subject, has enabled scientist to begin to unravel the secrets of how embryos develop.


998). The Industrial Revolution, making it possible to mass-produce manufactured goods, was marked by their use of new machines, new energy sources, and new basic materials.

A) making it possible to mass-produce manufactured goods, was marked by their use of

B) making possible the mass production of manufactured goods, marked by the use of

C) which made it possible that manufactured goods were mass-produced, was marked by their using

D) which made possible the mass-production of manufactured goods, was marked by the use of

E) which made the mass production of manufactured goods possible and was marked by using


Answers --

997). E is the best choice.

A - incorrect - a household nuisance cannot study about the house fly.

B,C,D - incorrect - are passive.

998). D is the best choice.

A, C - incorrect - antecedent of their not clear.

B - incorrect - distorts the meaning.