Please _______ us in the discussion. — I’d like to, but I’m _______ busy at present.

Varieties of household goods are soldhere, ________from babies’ toys to old men’s walking sticks.

______ the police thought he was the most likely one, since they had no exact proof about it, they could not arrest him

I’m feeling so tired now.— stop and have a rest

You think you are clever,____, I assure you that you are very foolish.