Identify the mistake in each sentence

 My father always has a lot of houseworks to do.

Choose the letter A, B, C or D the word that has the underlined part different from others: knit, hide, tide, fly

Choose the letter A, B, C or D the word that has different stress pattern from others.

Choose the letter A, B, C or D the word that has the underlined part different from others: sit, five, window, morning

Choose the letter A, B, C or D the word that has different stress pattern from others: suggestion, eraser, morning, ahead

Choose the word that has the stress pattern different from that of the other words: engineer, tomorrow, potato, tomato 

Choose the word that has main stress placed differently from the others: acquaintance, unselfish, attraction, humorous

Choose the word whose underlined part is pronounced differently from the rest in each group: surround, counting, country, about 

Choose the letter A, B, C or D the word that has the underlined part different from others: rough, sum, utter, union

Choose the letter A, B, C or D the word that has different stress pattern from others.

Choose the word which has a different sound in the part underlined.request, project,neck,exciting

Find a word which does not belong in each group 

Choose the word whose underlined part is pronounced differently from the rest in each group: beef, need, green, coffee

Choose the letter A, B, C or D the word that has the underlined part different from others: new, sew, few, nephew

 Choose a word (A, B, C, D) that has differently stress: (vegetable / intersection / businessman / unload)

Choose the letter A, B, C or D the word that has different stress pattern from others.

Choose the word that has main stress placed differently from the others: knowledge, maximum, athletics, marathon

Find the word which has a different sound in the part underlined.activity, compass,thank, have  

Choose the letter A, B, C or D the word that has the underlined part different from others.

Choose the word that has the stress pattern different from that of the other words: piano, policeman, museum, souvenir  

Choose the word that has the stress pattern different from that of the other words: drugstore, toystore, bookstore, temple