I can't call her b___ I don't have her telephone number

I can't call her b___ I don't have her telephone number
I can't call her b___ I don't have her telephone number

I can't call her b___ I don't have her telephone number
应该填：because
意思是：我没办法打电话给她,因为我没她的号码.

I can't call her because___ I don't have her telephone number
因为

back

because