日本成人片在线_久久免费精品视频_国产午夜精品久久久久久免费视_校花撩起jk露出白色内裤国产精品_av影片免费在线观看_国产小视频在线看_最新av免费在线观看_99久久99久久精品国产片_欧美成人猛片aaaaaaa_蜜桃免费网站一区二区三区

33．_______the activities might seem childish, in reality they require a lot of strength and determination.

       A．When                     B．As                          C．While              D．Once

      the activities might seem childish, in reality they require a lot of strength and determination.

       A．When                     B．As                          C．While              D．Once

_______the activities might seem childish, in reality they require a lot of strength and determination.

       A．When                     B．As                          C．While              D．Once

_______the activities might seem childish, in reality they require a lot of strength and determination.

       A．When                     B．As                          C．While              D．Once

33．_______the activities might seem childish, in reality they require a lot of strength and determination.