9. I don't want to sound pushy, but you'll have to decide soon.
其不想让您认为我在催您，不过请您尽快下决定。
还能这样说：
I don't want to press you but you really need to make a decision quickly.
I don't urge you as you thought but you do really make a decision as soon as possible.
应用解析：
sound是“声音”的泛用语；
noise刺耳的噪音或嘈杂的声音；
tone音质、高低、强弱等一定频率的声音。

10. I'm sure you'll be pleased with this product.
我敢保证你会喜欢这种产品的。
还能这样说：
I bet you will have a good interest in this product.
I promise that you will enjoy this product.
谚语：
Promises are like piecrust, made to be broken.
诺言是脆弱的。

11. Remember that the offer ends next week.
别忘了下周报盘失效。
还能这样说：
Please don't forget that the offer will be ineffective next week.
Please keep in mind that the offer will be invalid next week.
应用解析：
put an end to one's life 自杀；
put an end to sth. 结束某事，终止某事，消灭某事

12. Why not buy a small lot and put them on trial?
为什么不小量买一批试试呢？
还能这样说：
Why don't you buy a little and have a try?
You can buy a small lot and try it as an experiment.
应用解析：
go on trial 受审判；
on trial 在试验中，在测试中；
put sb. on trial 使某人被告并受审；
trial and error 反复试验；从失败中找出解决办法；
trial run 初步测试