Sentence Correction
Verbal Ability

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Q.

Since the path-breaking discovery, just over fifty years ago, of the structure of the DNA molecule, scientists have made astounding progress to understand and manipulate this most important of biological molecules.

 A.

scientists have made astounding progress to understand and to manipulate

 B.

scientists have made astounding progress in understanding and manipulating

 C.

astounding progress has been made by scientists to understand and to manipulate

 D.

scientists made astounding progress in understanding and manipulating

 E.

astounding progress was made by scientists in understanding and manipulating

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Solution:
Option(B) is correct

he idiom is ‘progress is made in’. (Eliminate A and C.) Also, with the word ‘since’ we need a present perfect tense and so the only choice is B.


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