—What should we do to prevent H7N9 bird flu? —We must from crowded places.
--- How do you always go to school? --- I always _____ to school.
---____ is it from your home to school? –--I’m not sure, maybe 10 kilometers.
---What time do you usually get up ? ---________________.
She can sing and she can _______ dance.
Walking to school is ______ good exercise.