1 . Hunting and farming are physically d__________ for human beings, therefore women had to depend on men for survival, giving rise to a patriarchal society(父系社会). (根据首字母单词拼写)

2 . 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）

3 . China is working to make COVID-19 vaccines an ________(可使用的)and affordable public good in developing economies(根据汉语意思单词拼写)

4 . These questions asked in the meeting may at first seem of little ___________ (重要意义) but might become influential ones in the public. (根据汉语意思单词拼写)