M3U1 Vocabulary (1)
1① traffic signs 交通标志
The sign says/reads... 牌子上写着...
② There is a sign that… 有迹象表明…
③ 签名 ④ 打手势
2 confused/ puzzled look/ expression
困惑的神情/表情
3 conduct an experiment/a survey做实验/进行调查
4 observe … do/ doing/ done
be observed to do sth.被观察/注意到做了某事
observe the law 遵守法律