摘要： The children were dancing to music happily when all of sudden the recorder broke down. A. the; a B. the; / C. /; / D. /; the

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The children were dancing to music happily when all of sudden the recorder broke down．

The children were dancing to ________ music happily when all of ________ sudden the recorder broke down．

the; a

the;/

/;/

/; the

The children were dancing to ________ music happily when all of ________ sudden the recorder broke down．