they spent all night _____the work AtodoB doing

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theyspentallnight_____theworkAtodoBdoingtheyspentallnight_____theworkAtodoBdoingtheyspentallnight___

they spent all night _____the work AtodoB doing
they spent all night _____the work AtodoB doing

they spent all night _____the work AtodoB doing
B
spend...doing sth
花费时间做某事

B
花时间做某事 是 spent +一段时间+ doing sth