9. I do not know how to fill out the exchange form.
我不知道怎樣填寫兌換單。
還能這樣說：
Can you give me some help to finish the exchange form?
Could you tell me what I should do to fill in the exchange form?
諺語：
A leopard can't change its spots.
積習(xí)難改。
10. Opening a checking account may be economical for you.
對您來說，開立一個支票賬戶是實惠的。
還能這樣說：
It will be better for you to open a checking account.
That checking account will be affordable for you.
應(yīng)用解析：
be economical of one's time 節(jié)省時間；
an economical housewife 一個節(jié)儉的家庭主婦
11. Good morning. Are you being attended to?
您好，有人接待您了嗎？
還能這樣說：
Good morning. Have you been waited on?
Good morning. Are you being helped?
應(yīng)用解析：
not attend 無人值班；
attended substation 值班員變電所
12. You should fill in a form here first.
您首先需要在這兒填個表格。
還能這樣說：
Please fill out a form here first.
First, you need to fill out a form.
諺語：
The cask savors of the first fill.
先入為主。