The total mass of the Galaxy, which had seemed reasonably well established during the 1960s, has become a matter of considerable uncertainty.
i.which had seemingly reasonably well
ii.which had seemed reasonable well
iii.which has seemed reasonably well
The sentence is referring to a point in past, hence, had is correct. Seemed is the main verb which requires an adverb to qualify it, hence, reasonably is the verb which is correct.
Select the combination of letters that when sequentially placed in the blanks of the given letter series will complete the series.
g _ h h h _ _ ...
Select the correct combination that when sequentially placed in the given letter series will complete the series.
i _ g _ a e _ p _ q _ e i _ g q...
Select the combination of letters that when sequentially placed in the blanks of the given letter series will complete the series.
g _ _ _ h i _ ...
Select the number combination of letters that when placed sequentially in the blanks of the given series will complete the series.\
a b c _ e _ g...
Select the combination of letters that when sequentially placed in the blanks of the given letter series will complete the series.
W _ _ H E _ _ ...
Select the combination of letters that when sequentially placed in the gaps of the given letter series will complete the series.
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Select the combination of letters that when sequentially placed in the blanks of the given letter series will complete the series.
o _ p p p _ _ ...
Select the combination of letters that when placed sequentially in the blanks of the given series will complete the series.
e _ g h _ _ f _ h _ e...
Select the missing number from the given alternatives.
Select the combination of letters that when sequentially placed in the blanks of the given series will complete the series.
P _ _ S T _ Q R _ T _ Q _ _ T
