Употребить сокращенную форму глагола.
1) Vera has not got a zebra
Vera ...... got a zebra.
2) Oleg's clock is not big.
Oleg's clock ..... big.
3) Olga has not a clock.
Olga ..... got a clock.
4) Lena has not got six cakes.
Lena ..... got six cakes.
5) Dogs cannot skip.
Dogs ..... skip.