1. Underline the correct option. (Sublinhe a opção correta)

a) I - be/am/ is twelve years old.
b) They - be/am/ are in the garden.
c) It - am/is/are six o'clock.
d) You - be/is/are a dentist.
e) I - am/is/are in the station.
f) It - am/is/are very hot.
g) My sister - am/is/are at work.
h) I-be/am/ are hungry.
i) We - am/is/are students.
j) The book -be/is/are about tigers.​