___ before on  Cash Against Documents Basis."> ___ before on  Cash Against Documents Basis.">
We shall be glad if you will agree ship the goods to us ___ before on  Cash Against Documents Basis.
We shall be glad if you will agree ship the goods to us ___ before on  Cash Against Documents Basis.
A、for
B、because
C、since
D、as
【正确答案】：D
【题目解析】：as before像之前一样
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