例句：
Are you still single?
你还是单身吗？
How much is the single fare to Glasgow?
去格拉斯哥的单程票多少钱？
When will the single currency be operable?
什么时候实行单一货币？
The band releases its new single next week.
这支乐队将于下周发行新的单曲唱片。
