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Первый урок начался в 9.10; в 9.40; в 10.15; в 10.45; в 11.35; в 12.05; в 1.35; в 2.05; в 2.40; в 3.10

The first lesseon star at 9 and 10o`clock.

Дальше по образцу подставляешь.

The first lesson began 10 min past 8

The first lesson began 20 min to 10

The first lesson began a quarter past 10

The first lesson began 15 mim to 11

The first lesson began 35 min past 10

The first lesson began 5 min 12

The first lesson began 25 min to 2

The first lesson began 5 min 2

The first lesson began 20 min to 3

The first lesson began 10 min 3