阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。Chengdu, a cultural center in Southwest China, is renowned for its opera, a part of Sichuan Opera tradition. An important aspect of Sichuan Opera is the magic of mask changing, also known 　　　1　　　 “face-changing”, 　　　2　　　 vividly coloured masks are changed within the blink of an, eye. It is believed that “face-changing” has its roots in evolution. This art form 　　　3　　　 (originate) from early humans’ survival strategies, with aggressive facial expressions and non-verbal cues. The Sichuan Opera is said to have brought this change of emotions on stage.The techniques include wiping, pulling, and blowing. Among them, “pulling” is a more complex and 　　　4　　　 (frequent) used technique in which faces are painted on layers of silk cloth and each mask 　　　5　　　 (tie) to a thread which is fastened and 　　　6　　　 (hide) in the costume. The actor swiftly pulls masks 　　　7　　　 (convey) emotions, amusing the au trace. Face-changing is more than a skill; it contains rich cultural meanings, with masks 　　　8　　　 (reflect) characters’ psychological and emotional shifts. The patterns of the facial makeup are borrowed from Chengdu and local customs of 　　　9　　　 region. The different kinds of characters and personalities that Sichuan Opera brings alive on stage can be found among common people in Chengdu as well. This is 　　　10　　　 its emotions will continue to resonate (共鸣) with people for a long time.