－Would you mind me opening the window, sir－_______. I’m feeling a bit chilly.

Mum went on ________ the housework after she helped me with my homework.

What did you do before you came here–I _______ in a factory.

when shall we go to visit my grandpa—Grandpa is very busy at presentWe’ll go to see him whenever__________

How do the shops make money ifthey sell at such low prices?— Manufacturers, it seems, are willing to bring down prices____ big volume purchases[ ]