Choose the word that has main stress placed differently from the others

I. Choose the word that has main stress placed differently from the others:
1. A. unaffected B. undrinkable C. uncountable D. unsuitable
2. A. unpopular B. unorganized C. unfortunate D. unambitious
3. A. imperfect B. immature(chưa chín chắn) C. immobile D. immoral (trái đạo đức)
4. A. translator B. director C. editor/edit/ D. spectator
5. A. consumer B. performer C. shopkeeper D. believe
6. A. impair B. unhurt C. effect D. insect
7. A. explorer B. accurate C. unhealthy D. mature 
8. A. unnatural B. engineering C. impossible D. environment
9. A. unhelpful B. unlikely C. unforeseen  D. unusual
10. A. imprecise B. imperfect C. impartial D. impassive
II. Find the word which has different stress pattern from the others.
1.A. person    B. father    C. teacher    D. enjoy
2. A. prefer    B. enjoy    C. mother    D. agree
3.A. doctor B. father C. picture D. fancy
4.A. pollution    B. visit    C. listen    D. open
5.A. depend    B. advise    C. affect    D. listen 
6.A. affect    B. father    C. teacher    D. picture
7. A. prefer    B. enjoy    C. mother    D. affect
8.A. affect B. happen C. pollution D. fancy
9.A. pollution    B. picture    C. village    D. factory
10.A. illustrate    B. believe    C. affect    D. village