need a lucid explanation. TIA…
Science advances in (i)_____ spiral in that each new conceptual scheme (ii)_____ that phenomena explained by its predecessors and adds to those explanations.
A discontinuous… decries
B a repetitive… vitiates
C a widening… embraces
D anomalous… captures
E an explosive… question
Politeness is not a (i)_____ attribute of human behavior, but rather a central virtue, one whose very existence is increasingly being (ii)_____ by the faddish requirement to "speak one’s mind.
See that new conceptual scheme is adding to old explanations, it means its becoming big as something is being added, so widening fits in blank 1
This says adding to those explanations, it means they are keeping old ones
and logically when you are adding something, you are not contradicting old idea, you are just giving some more info supporting old or existing ideas, based on this we can go for embrace.
Second Question,
if politeness is central virtue then its not something on the top or surface level, hence choose superficial
blank 2: when politeness existence is ? see the other end of sentence by faddish requirement to speak ones mind. Does speaking ones mind means being polite or not polite, usually it means not being careful enough to be polite, hence second blank should be like politeness is at risk, so go for threatened