Resolução de exercícios página 18

Ex.: 1
a) could
b) can't
c) can/could
d) couldn't
e) couldn't

Ex.:2
a) May I smoke?
b) May I have a little more coffee, please?
c) Family members may not see patients outside visiting hours.
d) May I ask you something?
e) May I leave the room a minute?

Ex.: 3
a) P
b) O
c) AO
d) O
e) D

Ex.: 4
a) should have been
b) should we do
c) shouldn't have gone
d) should apologize
e) Should I have asked

Ex.: 5
B

Ex.: 6
D