A: I guess David should study more for his exams.
B: I guess David ...... .

A: My distant cousin Greg should learn to take care of himself at last.
B: My distant cousin Greg ...... .

A: Veronika's parents should lock the front door when there's no one at home.
B: Veronika's parents ...... .

A: Our teachers should be more considerate of their students' feelings.
B: Our teachers ...... .

A: Simon should do his homework every evening, not only on Wednesdays.
B: Simon ...... .

A: Trevor shouldn't speak so loudly all the time.
B: Trevor ...... .

A: My supervisor shouldn't shout at his colleagues so often.
B: My supervisor ...... .

A: The dog shouldn't have any more meat.
B: The dog ...... .

A: Some tennis players shouldn't boast about their success that much.
B: Some tennis players ...... .

A: Alex shouldn't sell his old car.
B: Alex ...... .

A: Should I post the letter now?
B: ...... ?

A: Should you be up this late at night?
B: ...... ?

A: Should the parents go and see the teacher tonight?
B: ...... ?

A: Should Simon order another pizza?
B: ...... ?

A: Should we invite the neighbours to our party on Saturday?
B: ...... ?