题目

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'll see a big tree. Go straight on for about a hundred meters. and you will see a big red house. This is not my home. Go past the big house about four hundred meters. and you'll see a small yellow house beside a little tree. Then you can open the door wi（2012?闸北区二模）下图所示实验操作，正确的是（　　）A．B．C．D．