— Mum, would you please buy me an MP5 player? — If you can help do the dishes the whole vacation, you ______ have one as a reward. 

When he was there, he ______ go to that coffee shop at the corner after work every day.

When I was a child, my father ______ read me a story at night before bedtime．

-- Mum，can I go on a holiday with my classmates this summer vacation?-- OK．You __________ have a chance if you get along well with your studies．

The problem is too difficult for him. He _______ solve it by himself without any help.