题目内容
【题目】Valentine’s Day is the time of the year when couples show their love for each other by sending cards,flowers and chocolates. Its origins are________(clear) and hidden in the river of time.
【答案】unclear
【解析】
试题分析:unclear 考查形容词。根据后面的hidden可知情人节的起源是不清楚的,还隐藏在历史的长河中。clear清楚的,其反义词为unclear。故填unclear。
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