【推荐1】The teacher didn't understand all the reasons _______ were given by the student for being absent from school the day before. （用适当的词填空）

【推荐2】In addition to trade exchange, the network served ______ a bridge for cultural exchange ______ shaped the evolution of science, art, technology and many other areas in societies along the network. (用适当的词填空)

【推荐3】Ask people ________ have studied overseas if the experience has helped them educationally and financially in the long run. (用适当的词填空)

【推荐2】The shoes ________ she bought online arrived today. (用适当的词填空)

【推荐3】The museum ________ we visited during a recent trip to Britain is one of London’s tourist attractions.