A number of scientists in the country think that they are on the of a major ........

English Language (IBPS PO) Fill in the blanks

Direction (): In each of the following sentences there are two blank spaces. Below each five pairs of words have been denoted by numbers (A), (B), (C), (D) and (E).
Find out which pair of words can be filled up in the blanks in the sentences in the same sequence to make the sentence meaningfully complete.

A number of scientists in the country think that they are on the ____________ of a major _____________.

gateway, breakthrough

centre, achievement

periphery, success

threshold, overhaul

frontier, experimentation

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Explanation:

Gateway, breakthrough’ fit the blanks best as gateway means ‘the place which you must go through in order to get to somewhere else’ and breakthrough means ‘an important discovery or development’.