13. Three ___________ [thieves / thiefs] were put in prison?
13. Three ___________ [thieves / thiefs] were put in prison. 14. How old are you? - I'm ________ [forty / fourty] . 15. They _________________ [were watching / watched / ] TV when I ___________ [was arriving / arrived] . 16. He plays volleyball ________ [on / at / in] Sundays. 17. The bus arrives ________ [at / on / in] London ________ [at / on / in ] six o'clock. 18. The car ____________ [was sold / is sold] yesterday. 19. Karen told the children _______________ [that they didn't play / not to play] football in the garden 20. I don't understand ________ [that / what / which] you say. Could you repeat it?