They have to walk_________8 country parks and___________20 hills and mountains. [ ]

The doctor told him that he should take a holiday to relax himself, but _________ didn’t help.

Do you think a radio is useful in learning English? —Sure. A radio can _____ listening English songs and reports.

I can’t understand the story correctly ______ the new words in it.[ ]

If I have a big house, I will——- a pet dog.