价格促销指在原价格上直接进行()的促销形式。
A、获得赠品
B、组合搭配
C、消费抵用
D、折扣让利
参考答案:D
The problem is ________ sometimes when we are given something on a constant basis, we start to take them for granted and forget being thankful for what we already have.
A.that
B.how
C.where
D.which
变晶结构