问答题
用所给的词和词组写出符合逻辑的句子。 we will/supply/be unable to/the goods/we receive/payment/unless/in advance
A.that B.for C.we D.To
A.in the case B.so C.therefore D.for
A.are not B.had not been C.has not been D.were not
A.designed B.they are to be designed C.it is designed D.they are being designed