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    uring the summer vacation
    0:15

    uring the summer vacation

    r knowledge
    0:30

    r knowledge

    of them to take part in
    0:16

    of them to take part in

    a lamp on the desk
    0:26

    a lamp on the desk

    Dear David
    0:18

    Dear David

     2  views
    at i think.First
    0:20

    at i think.First

    in addition
    0:25

    in addition

    y. Theyre my mother
    0:25

    y. Theyre my mother

    he examination environment
    0:26

    he examination environment

    ing. Do more English reading
    0:25

    ing. Do more English reading

    he examination environment
    0:25

    he examination environment