Madame Curie devoted her life to ________ radium.
A. reseach
B. reseaching
C. reseached
D. be seached
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Lucy decided to _________ by herself.
A. live
B. living
C. be lived
D. have lived
Boys like to ________ some exciting games.
A. play
B. playing
C. played
D. being played
【填空题】一般来讲,民间舞蹈由歌、____、乐三部分组成
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