根据短文理解完成下列各题。

    Nancy and Sheila are in the same class. They are friends. Nancy wants to invite Sheila to dinner on Sunday. But Sheila doesn't know the way. Now Nancy is telling her.

    It's easy. You can take No. 4 bus. After you get off at Red Road, cross it and take the first turning on the left. Walk along the road for about five minutes, and then you will see a big tree. Go straight on and walk about 100 metres, you'll see a big red house. This is not my home. Go past the big house about four hundred metres, and you will see a small yellow house beside a small tree. Then you can open the door with your foot.

    "With my foot?" asks Sheila. "Why?"

    "Well, you won't come to my house empty-handed(空手地), will you?" answers Nancy.