Class : Class 7
the correct answer is "upon" b'cuz if we say "on" it is still moving and if we say "upon" it is in one place and is not moving
Ans 2:
Class : Class 8
D)continuous
Reason :- a spontaneous applause meaning of spontaneous doesn't go with any word like
ex:-
at once applause
at once doesn't fit or go with applause
while continuous applause
continuous applause does fit with the word.