1 . The three most historic sites in Pingyao, often________ (refer) to as the city’s “Three Historic Treasures”, are the ancient brick-made city wall, Zhenguo Temple and Shuanglin Temple. (所给词的适当形式填空)

2 . In the proposals __________   (submit) so far, members mainly focus on issues relating to people's daily life, such as health care and education. （用所给词的适当形式填空）

3 . A girl drew public attention for her outstanding performance at The Chinese Poetry Competition __________(organize) by China Central Television. (所给词的适当形式填空)

4 . Have you heard of the expression ”Once_________ (bite), twice shy“? It means a person who has failed or been hurt when trying to do something is careful or fearful of doing it again. (所给词的适当形式填空)

5 . Geography, _____ (define) as the study of Earth, has always had a focus on maps. But mapping hasn’t always been easy. (所给词的适当形式填空)

6 . Authorities in the region are returning to a lake on Sunday as search efforts continue for two missing teenage girls ____________ away while tubing(漂流) when intense winds struck last week. (sweep) (所给词的适当形式填空)

7 . The outburst might have been generated by a star ________(撕裂) to shreds when it ventured too close to a black hole in its host galaxy. (根据汉语提示单词拼写）