3. What time is it? Que horas são? ( ) It is two o'clock. ( ) It is five thirty () It is ten thirty ( ) It is half past ten. ( ) It is two o'clock. ( ) It is eight o'clock.

Resposta:
a) 1- it is two o'clock
b) 3- It is eight o'clock
Explicação:
usa-se o'clock quando a hora está extra (8:00, 3:00, 17:00....) para indicar a hora em ponto. nos demais fala-se como se lê