1 . The idea behind couch surfing is that travelers find free________ (住宿), from simple couches to spare bedrooms, in the homes of local people. （根据汉语提示单词拼写）

2 . Closely a________with comedies in the public mind, Charlie Chaplin has long been regarded as a nonverbal humor master. (根据首字母单词拼写)

3 . Mutation(变异) of virus indicates such self-protective measures as wearing masks, maintaining social distance should never be o___________ (根据首字母单词拼写)