5. It is high time you changed your sales approach.
你应该改变营销策略了。
还能这样说：
Time is up for you to change the sales approach.
It's the time to adjust your sales strategy now.
应用解析：
at the approach of 在……将到的时候；
be approaching to 与……差不多，大致相等；
be difficult to approach 难以到达，难以接近

6. You should meet the customers' current demands.
你们应该满足顾客目前的需求。
还能这样说：
You should satisfy the customers' present requirements.
You ought to meet the customers' current need.
应用解析：
meet up 偶然碰到；
meet situation 应付局面；
meet an emergency 应付紧急情况；
meet bill 付账；
meet as strangers 像陌生人一样相见

7. You should make a great effort to attract the customers.
你们应该尽力吸引顾客的眼球。
还能这样说：
You should do all you can do to draw the attention of the customers.
You should endeavor to engage the customers' attention.
应用解析：
effort to do sth. 努力，奋斗。
例如：It was a real effort to stay awake through the film.
真要强打着精神才能看完整部电影。

8. The unique design of the packing will help us promote the sale of drugs.
独特的包装将有助于我们推销这些药品。
还能这样说：
Special design is helpful for us to promote the sale of drugs.
The sale of drugs will benefit from the unique packing.
应用解析：
a drug on the market 滞销品，滞销货；
drug addict 有毒瘾者，吸毒者；
drug dealer 毒贩