第二节 语法填空 （共10小题：每小题1.5分，满分15分）
阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空，并将答案填写在答题卷标号为31～40的相应位置上。
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 31 （clear） and hidden in the river of time．Nobody knows exactly 32 St. Valentine was，although some historians suggest he was 33 Roman killed in the third century AD by a Roman Emperor. It is said that the first 34 （record） Valentine’s card was sent by the imprisoned Duke of Orleans in 1415． 35 is believed that he tried to find comfort from his imprisonment by writing love poems to his wife．
