Outstanding, extraordinary, brilliant, incomparable, excellent.
You can use the word "superb" instead of excellent. Other alternatives include "outstanding," "exceptional," or "magnificent," depending on the context. Each of these words conveys a similar sense of high quality or superiority.
noteworthy, important, of consequence, remarkable, exceptional
Exceptional, unparalleled, preeminent, unmatched, excellent...
Instead of using the word challenging you can use the word gifted, special, special gifted.
or
Will, when, why, it, can
Myself
I have a stomach ache.
mixture
are
used to be
is, it, in the past.