Swimming can be ______ exciting sport for kids in summer.

You needn’t worry about __________ food to eat now.

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

Mum, I failed to catch the train.- If you __________ at the station tenminutes earlier, you could have caught it.

My sister Shanghaifor two years.