构词法专练。给下列单词加上前缀dis-, un-, in-或im-, 构成意思相反的词。1. agree _______        2. complete _________3. healthy _________4. important ________5. able _______        6. cover _________  7. known _______        8. practical _________9. tidy _______        10. perfect
disagree        
incomplete
unhealthy
unimportant
unable
discover / uncover
unknown
impractical
untidy
imperfect
invisible
unfit
构词法专练。1. true _______        2. complete _________3. healthy _________4. possible________5. able _______        6. careful _________  7. terrible _______        8. practi ...