---Do you know_______ it is from our school to Yangzhou? ---I am not sure. I guess it's about 40 minutes by bus.

---What’s wrong with you? ---I have a _______.The doctor asked me not to eat anything today because I ate too much yesterday.

—I want to know ______ your son is.—He is ten years old.

-- ________do you usually go to work?--I usually ________a bus to work.

- Which share is meant for me? - You can take_______ half. They are exactly the same.