IMPROMPTU
(a) Important
(b) Impressive
(c) Inspiring
(d) Offhand

LUCRATIVE
(a) Profitable
(b) Important
(c) Challenging
(d) Worthwhile

FORTHRIGHT
(a) Honest and outspoken
(b) Serious and stubborn
(c) Strong and brave
(d) Willing and determined

REPRIMAND
(a) Praise
(b) Reminder
(c) Rebuke
(d) Reward

PUNCTILIOUS
(a) Serious
(b) Careful
(c) Punctual
(d) Hardworking

DISCREET
(a) Mature
(b) Intelligent
(c) Clever
(d) Prudent

MOMENTOUS
(a) Time-tested
(b) Momentary
(c) Very important
(d) Hectic

PORTEND
(a) Profess
(b) Portray
(c) Think
(d) Foreshadow

ODIUM
(a) Illness
(b) Hatred
(c) Oddity
(d) Devious

She is a woman of sterling qualities.
(a) interesting
(b) genuine
(c) irritating
(d) exciting

Although the boys in his class were naughty, he never resorted to corporal punishment.
(a) harsh
(b) physical
(c) unjust
(d) general