9. He is wise for his age.
他虽年轻，却很博学。
还能这样说：
He's wise for a man of his age.
Though he is young, he is learned.
谚语：
It is easy to be wise after the event.
事后聪明，后知后觉。

10. It's my turn to buy you dinner.
这次我请客。
还能这样说：
This time you will be my guest.
This is my treat.
应用解析：
state dinner 国宴；
TV dinner 冷冻快餐

11. Can you give me a ride?
你可以载我一程吗？
还能这样说：
Can I get your lift?
Could you drop me off?
应用解析：
ride and tie 两人轮流骑一匹马或乘一辆车旅行；
ride at 骑马驶向；
ride away 岔开

12. Can you oblige me with your phone?
可以借用一下你的电话吗？
还能这样说：
Do you mind me using your phone?
Could you spare me your phone?
应用解析：
oblige by 劳驾；
oblige with 以……使满足

13. Could you help me?
可以帮个忙吗？
还能这样说：
Could you do me a favor?
Would you give me a hand?
应用解析：
help意思较aid，assist强，指以积极态度给予各方面的帮助，强调受助者得到帮助或好处，并着重受助者对帮助的需要；
assist是正式用语，多指在提供帮助时，帮助者起次要或起协助作用。