She spent four weeks which she could afford _______ around the country, promoting her new album.

---Can I help you? --- I’d like a ticket for tonight’s show. How much do you _____

Too many hotels have been built and this has _____ prices, making holidays cheaper.

 In many countries, some scientists are already _______ research in order to produce a cloned human baby.

The teacher stressed again that the students should not ______ any important details while retelling the story.