My son likes walking around in _____ feet.— It’s the case of kids. Mine once got badly hurt.[ ]

It is said that bad living habits as well as dirty surroundings, stuffy rooms and some other factors _____ the wide spread of H1N1.[ ]

We had a long meeting yesterday. It _____ four hours.

You looked unhappy. What’s wrong?—I ________my PE exam again last week.

23．Some people tried to separate our country by taking illegal action, which didn’t exactly _____ racial harmony.