A:why
B:wa
C:that
D:because
根据首字母或汉语提示完成句子
价后甲、乙两种商品的单价和比原单价和提高了5%,求甲、乙两种商品的原单价分别是( )
— Tomorrow will be fine. Shall we go out for a picnic?
— __________.