How much shall I pay for the phone call — You ________ This is free of charge

If you ______ half an hour every day for English reading, you are sure to improve your reading ability.

Guess what, we’ve got our visas for a short-term visit to the UK this winter.— How nice! You ______ a different culture then.

The little boy __________ his seat to an old lady on the crowded bus.

Is John doing his homework now? — He should, but he _______ not. He likes playing computer games.