向各位请教两道PP语法题,谢谢!

今天做了一做PP,TEST2,有两道问题始终搞不明白,希望各位高人能给我指点指点.谢谢!
65. Photographer Edward Steichen constantlyexperimented new techniques and materials in his quest to have photography acceptedas a creative art.

130. Intricate choreographer emphasized the beauty and

    virtuosity of the nineteenth-century prima ballerina,

    while the male dancer functioned only as her partner

    until the twentieth century.

65...experimented with new......

130......choreography....