afraid是什么意思,worried是什么意思

人教版九年级英语全一册unit4 i used to be afraid of the darks 2
天津徐庄子中学:unit 2 i used to be afraid of the
m.27.____ aren't you afraid of (担心) being late?
i am afraid he won't come on time.
2016春六年级英语下册 unit 7《im not afraid》课件5