12. I'm glad that the CDs have taken off so well.
我非常高兴CD的销路很好。
还能这样说：
I am very happy about the well selling of our CDs.
I am pleased to see that our CDs sell well.
应用解析：
glad to do sth. 高兴做某事，愿意并热切要做某事；
glad rags 庆祝场合穿的衣服；
I would be glad if 常用于反语中，要是……的话我将非常高兴；
a glad occasion 喜事

13. We should change the packing to attract more customers.
我们应该改变包装以吸引更多顾客。
还能这样说：
The change of the packing can pull more customers in.
Changing the packing can make more customers pay attention to our products.
应用解析：
change front 改变论调；
change into 变为，使改变；
change over 大幅度改变，完全改变；
change side 改变立场

14. Our booth should be more conspicuous.
我们的展台应该更加醒目。
还能这样说：
We should make our stand more eye-catching.
Our stand should be set for all people to see.