Accounting mistakes cannot be avoided.

Good manners may be varied（） cultural backgrounds.

In order to make proper reservations， will you send your acceptance to the attention ofProfessor Chen（） a week before that day？ 

根據(jù)寫作要求，寫出一篇作文。Suppose you are Simon. You purchased a Sony digital camera from Amazon.com and found that there were scratches on the screen. You are writing to complain about it.

（）you have said is very important to us.

（）a vacation is always a good way to get relaxation and refreshment.

The payment is made by an irrevocable（） letter of credit in our favor.

Try your best to know your costs before you set produ.

The manager asked me （）I could finish my work before the weekend.

It is very important to understand buyers’ behavior.