--Who’s the man over there?Is it Mr Black?----It _____be him.He’s much taller.

–Carla _______ go to that historical museum after school when she was a teenager. --No wonder she is so familiar with it. 

--The weather has been very hot and dry.--Yes. If it had rained even a drop, things would be much better now! And my   vegetables   .

The lady in the sitting room           be over sixty. She looks so young.

—Can I go to the park, Mum?—Certainly. But you ______ be back by six o’clock.