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2. It's a quarter past nine. / It's nine fifteen. 
3. It's ten past eleven. / It's eleven ten. 
4. It's a quarter to three. / It's two forty-five. 
5. It's twenty past five. / It's five twenty. 
6. It's twenty-five to nine. / It's eight thirty-five. 
7. It's five to eleven. / It's ten fifty-five. 
8. It's twenty to two. / It's one forty.