9. Your teachers will be very happy when they get your postcards.
你的老师收到你的明信片时会很高兴的。
还能这样说：
Your teachers will feel delighted by receiving your postcards.
Your teachers will be pleased when they receive your postcards.
应用解析：
get along with... 和……相处;
get done with 做完，结束;
get down 落下;记下;吞下;使沮丧
10. The front of the postcard shows a picture of the Imperial Palace.
明信片的正面是一幅故宫的照片。
还能这样说：
There is a picture of the Imperial Palace on the front of the postcard.
On the front of this postcard, it shows a picture of Imperial Palace.
应用解析：
put on a show 假装，装病;
put up a good show 演出好，干得好;
road show 巡回演出;新片放映;
quiz show 智力竞赛节目
11. Could you give me some advice about the postcards?
你觉得我买哪种明信片好呢?
还能这样说：
Can you recommend me some postcards?
Can you suggest which postcards I should buy?
应用解析：
ask advice of 征求意见，请教;
by sb.'s advice 依某人的意见;
a written advice 劝告书
12. I want to send a postcard to my pen friend.
我想给我的笔友寄张明信片。
还能这样说：
I'd like to mail my pen friend a postcard.
I need to send my pen friend a postcard.
应用解析：
send things flying 使东西抛向各处;
send sb. packing 叫某人走开;
send sb. to Coventry 拒不与某人谈话