Instead of using the word challenging you can use the word gifted, special, special gifted.
Substitute or exchange can be used instead of replace.
The feeling of completing a challenging task was truly satisfying.
Meaningless,Regulation or act,Formal,Rigid observation of rules and regulations,
Reliable.
The United States uses the word "fall" instead of "autumn" to refer to the season.
Will, when, why, it, can
or
Myself
I have a stomach ache.
mixture
are
used to be
Answer.
is, it, in the past.
no "It" is not used instead of he and she...
Use the word "how" when asking "in what manner". Use the word "why" when asking "for what reason".
use the word job