Excuse me，could you pleaseyour cigarette?——Sorry, I won’t.

________ is it from your home to school? —Three miles. [ ]

You ____ very happy this afternoon. Why? —Because we are going to spend the evening at Lily’s house.

It has been proved _______ eating vegetables in childhood helps to protect you against serious illnesses in later life.

Must I finish the work today?—No, you.