<單字複習>
已選單詞
abundant
ample
basic
compulsory
considerable
countless
essential
final
finite
fundamental
generous
inadequate
infinite
initial
insignificant
limited
main
major
mandatory
meager
minor
necessary
nonessential
numerous
optional
optional
original
plentiful
primary
required
restricted
scarce
secondary
significant
substantial
sufficient
tertiary
trivial
ultimate
unlimited
unnecessary
unrestricted
voluntary
