Choose the correct answers
26.​I ____ go now, my class starts in a minute and I can’t be late.
A can
​​​​C have to​
B must
​​​​D could
27.​I’ve got a problem. I need your advice. What do you think I ____ do?
A could
​​​​C have to​
B must
​​​​D should
28.​You ____ talk in here. It’s prohibited.
A couldn’t​​​​
C mustn’t
B shouldn’t
​​​​D don’t have to
29​.Richard is very ____, he never remembers anything.
A self-centred​​​
C conscientious
B sensible​​​
D forgetful
30.​I ____ stay in bed because I was ill.
A had to
​​​​C could​
B must​​​​
D should