No credit will be offered（）you place an order for more than 40.000 units.A、 afterB、 whenC、 ifD、 unless
题目
No credit will be offered（）you place an order for more than 40.000 units.
- A、 after
- B、 when
- C、 if
- D、 unless
No credit will be offered（）you place an order for more than 40.000 units.