国开大学商务英语1-6答案(17)

—

: Ok, see you later.

; Stay longer.

; Go slowly.

标准答案：Ok, see you later.

题目49：Those numbers come to mean the world to you they give you the record of how much money you’ve earned or lost.

: because

; in case

; so that

标准答案：because

题目50：—Hello, Sally. What’s the matter with you You look worried.

—

: Yeah, that’s true. It requires great attention.

; What shall I do if a customer doesn’t pay up on the due date

; Don’t mention it.

标准答案：What shall I do if a customer doesn’t pay up on the due date

题目51：After that, we have to post letters.

: a series of

; a set of

; a lot of

标准答案：a series of

题目52：is very important that you don’t make any mistakes when