单选题 Evening dress necessary.
  • A．You must wear your evening dress.
  • B．You don't have to wear evening dress, but you can if you like.
  • C．Evening dress will make you look nice.


【正确答案】 A
【答案解析】[精析] 本题意为“晚礼服是必须的”，其中necessary意为“必要的，必须的”，即“have to”或者“must”，选项中A的意思与题目意思一致。故选A。