<單字複習>
已選單詞
accessible
active
aggressive
artificial
available
busy
clean
closed
contaminated
dangerous
dirty
energetic
fake
false
formal
free
friendly
genuine
hostile
idle
illegal
illegitimate
impersonal
impure
inaccessible
informal
inorganic
insecure
invalid
lazy
legal
legitimate
natural
occupied
official
open
organic
passive
peaceful
personal
polluted
private
public
pure
real
risky
safe
secure
social
synthetic
true
unavailable
unfriendly
unofficial
valid
violent
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