Thanks your telephone number.Can I call you the number?A. for onB. at atC. at forD. for at

问题补充：

Thanks your telephone number.Can I call you the number?

A. for,on

B. at,at

C. at,for

D. for,at

答案：

A. for,on

B. at,at

C. at,for

(答案→)D. for,at

解析：表示因什么而感谢用介词for，表示以什么号码用介词at，故本题选D。