Yes! Work! Extremely important work! We need a house. A house with rooms. Come on, you two. Keep up!
[And the Doctor sets off at a rapid pace, having released Rose's hand earlier when the suggestion of sharing a room with her had come up. He doesn't go so quickly that his companion's can't keep up, but he almost seems to be trying to put the recent awkwardness behind him by walking as fast as he possibly can.]