作业帮They spent half a year in building that bridge.(同义句）
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They spent half a year in building that bridge.(同义句）
They spent half a year in building that bridge.(同义句）
They spent half a year in building that bridge.(同义句）
They spent half a year in building that bridge.(同义句）
It took them half a year to build that bridge.
or
They used half a year to build that bridge.
It took them half a year to build that bridge.
They used half a year to build that bridge.
It took them half a year to build that bridge