ХХ ғасырдың бірінші жартысындағы қандай ғылыми ашулар мен жаңа технологиялар ерекше маңызды болды?​

1)          my working day begins at seven o’clock. my working day doesn’t begin at seven o’clock. does my working day begin at seven o’clock?

2)          at half past seven we have breakfast. at half past seven we don’t have breakfast. do we have breakfast at half past seven?

3)          he takes a bus to his factory. he doesn’t take a bus to his factory. does he take a bus to is factory?

4)          my mother is a doctor, she leaves home at nine o’clock. my mother isn’t a doctor, she doesn’t leave home at nine o’clock. is my mother a doctor? does she leave home at nine o’clock?

5)          it takes me fifteen minutes. it doesn’t take me fifteen minutes. does it take me fifteen minutes?

6)          helen has a car. helen doesn’t have a car. does helen have a car?

7)          i am a good friend. i am not a good friend. am i a good friend?

8)          you are good friends. you are not good friends. are you good friends?

9)          it is difficult to remember everything. it is not difficult to remember everything. is it difficult to …?