We usually write a request letter when we（）.

We usually write a request letter when we（）.
A.ask for informaiton about services or products
B.want to request a job interviw
C.want to approach bank for loans
D.want to appy for business credit
正确答案：ask for informaiton about services or products；want to request a job interviw；want to approach bank for loans；want to appy for business credit