4.complete the conversation with the correct answer.
A:Excuse me. You....... eat food in the museum.
B:Oh,I'm sorry. Where........I eat food?
A:You can eat food in a special food and drink area. It's on the fifth floor.
B:.......I......take the stairs?
A:No,you.........take the stairs. You can take the elevator.
5..............
1.You ......... take photos in the museum. Please put away your camera now.
2.I ............go to work today. It's a vacation.
3.You.........study every day because the exam is very difficult.