18.              .They  ……………….(never / work) hard before.

23                .Let's ………….(meet) him on the corner of this street.

24. Where ……… You ……..(go) now? – I ………….(go) to the theater.

25..He ……………….(not do) morning exercises regularly.

26. …… he ………….(do) morning exercises now?

27. If it (be) ...................... nice tomorrow, we (go) ...................................... on a picnic.

28 . ...................... you ever (see) ........................ a real robot ?

29. Nam  often ( watch)  ………………………………. in the evening..

30. ……………………you ever (see) ……………………a real robot at work ? – No,  never

31.  If it  is nice tomorrow., we ( go) …………………………… on a picnic.

32.  They might not ( have) …………………………… a meeting next week

33 . Thomas (work) …………………………in this factory since 2006

34. If we ( not economise)…………………….on electricity there will be power cuts.

35. Look at the sky!. It (rain) ……………………………………….