books/disappear (-)

(a)  

there/be/a female president in the USA (?)

(a)  

scientists/find/a cure for covid-19 (+)

(a)  

most people in the world/speak English (-)

(a)  

there/be/enough fresh water (?)

(a)  

domestic robots/do the housework (+)

(a)  

the police/track everybody (?)

(a)  

there/be/a colony on the Moon (+)

(a)  

we/meet/aliens from another planet (-)

(a)  

medicine in food/become popular (+)

(a)