Peter:   What are you doing for vacation, Steven? Steven:  I'm visiting my aunt in San Francisco. My brother's staying there. He's joining a club. Peter:   Oh? When are you going? Steven:  Next Friday. Peter:   How long are you staying? Steven:  I'm staying at my aunt's home for four days. I'm going sightseeing in San Francisco, and then I'm seeing all of my friends New York. How about you? Peter:   I'm going to the beach and my friends and I are also going hiking for a few days. Steven:  Aren't you renting video tapes and relaxing at home? Peter:   No, it's boring. We like outside activities. Steven is staying in his aunt's house for   _  .
a week four days several days two days