Jack is a businessman. He has three friends. They are Mary, Ann and David. Jack has a car. He drives to work. Mary works in a hotel. She goes to work on her bicycle. Where does Ann work? She works in a supermarket. She is a clerk. She goes to work by bus. David works in a park, and the park is not far from his home. How does he go to work? He walks to work.

The four friends often have parties on weekends.

表示职业的词：    1            2       

表示工作单位的词：    3            4             5  

中期计划的期限一般是( )

A．5年以上
B．2～4年
C．1年
D．1年以下