The price of diamond rings has risen____the price of gold rings has gone down(求解释）
A when B as C while D otherwise
人气：454 ℃ 时间：2019-10-26 23:19:09
解答
C
while 在这里是并列连词,表对比 “而” “然而”
再如：
This room is very clean,while that one is very dirty.
这个房间很干净,可那个房间却很脏
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