Choose the word (a, b, c, or d) that best fits each of the blank space

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Choose the word (a, b, c, or d) that best fits each of the blank spaces. Harry starts work (Question 21) ___ half past six. He delivers papers every day of the week, from Monday to Saturday, but not (Question 22) ___ Sundays. He works (Question 23) ____ the mornings before school and (Question 24) _____ the afternoons after school. He usually finishes work (Question 25) ___ six o’clock. Harry says, '(Question 26) ____ the summer, the job is OK, but (Question 27) ____ December and January, the weather is very cold! I like this job. I get a lot of exercise, and the money is good. I’m saving my money in the bank (Question 28) ____ the moment for a holiday in Spain.' Question 21:
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