3. 2) It's nine o'clock.
3) It's ten to seven.
4) It's twenty past four.
5) It's quarter past two.
6) It's twenty to eleven.
4. 1) I wrote a letter to my sister.
2) He did not repair his bike last Saturday.
3) It will be cloudy and windy tomorrow.
4) Does she cook breakfast and lunch?
5) Where did they skate?
6) Why were the children happy?