Choose one of word whose underlined part is pronounced differently

Ex1. Choose one of word whose underlined part is pronounced differently
1. A. christmas B. character C. school D. church
2. A. traveled B. surprised C. worked D. climbed
3. A. tour B. pour C. your D. course
4. A. towel B. down C. window D. flower
5. A. cook B. food C. too D. pool

Ex2. Choose the word whose stress pattern is different from the others 

1. A. realize B. improve C. possible D. comfortable
2. A. important B. especially C. prefer D. influence
3. A. general B.opinion C. abroad D.surprise