after a rest,they( )( )working on the experiment.

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afterarest,they()()workingontheexperiment.afterarest,they()()workingontheexperiment.afterarest,they(

after a rest,they( )( )working on the experiment.
after a rest,they( )( )working on the experiment.

after a rest,they( )( )working on the experiment.
go on:继续

went on
go on doing 继续做某事

went on继续

kept on
went on
用一般过去时吧